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Home My WebLink About100-139o>r r • THE STATE Department of Environmental 011-1LASKL'1 GOVERNOR SEAN PARNELL RECEIVED FEB 0 7 2014 February 4, 2014 A0GCC Certified Mail, Return Receipt Requested Article No.: 7012 2210 0002 1216 2391 Wayne Svejnoha BLM — Division of Resources 222 W 7th Ave, #13 Anchorage, Alaska 99513 Conservation Division of Spill Prevention and Response Contaminated Sites Program File: 320.38.010 SCANNED 0 2 2014 Re: Potentiall Responsible Party Notice Letter and Information Request NPRA Legacy Wells - General Hazard ID: 26125 Ledger Code: 14339387 Dear Mr. Svejnoha: 610 University Ave. Fairbanks, Alaska 99709-3643 Main: 907.451.2181 Fax: 907.451.5105 This letter is to advise you that the Alaska Department of Environmental Conservation (ADEC) has identified the 136 legacy wells within the National Petroleum Reserve in Alaska (NPRA) as potential contaminated sites. Some of these wells require extensive cleanup of oil and other hazardous substances released to the environment. Since you are identified as a current or past owner and/or operator of these sites, please be advised you may be financially responsible or liable for the investigation and /or cleanup of any hazardous substance contamination that might be present. Alaska Statute 46.03.822 establishes who is liable for contamination. Records available to the ADEC indicate that you meet one or more of the following criteria: » owned or controlled the hazardous substance at the time of its release; » own(ed) or operate(d) the property or facility from which the release occurred; » owned or operated property at which the hazardous substance came to be located; and » arranged for transport, disposal or treatment of hazardous substances that were released. Site History From 1944 through 1982 the US Government drilled 136 wells to explore for oil and gas resources in the NPRA. It is our understanding that other federal agencies and some private companies may have operated or managed these sites in the past. We have also been informed that 23 of these well have been conveyed to public and private entities. The ADEC currently lists 14 of the 136 legacy wells on our database of contaminated sites. The Bureau of Land Management (BLM) is identified as the responsible party for the following sites. Wayne Svejnoha 0 2 February 4, 2014 • BLM Cape Halkett Drill Site (File # 300.38.108) • BLM East Simpson #2 (File # 300.38.109) • BLM East Teshekpuk Drill Site (File # 300.38.110) The U.S. Army Corps of Engineers, under the Formerly Used Defense Sites program, is working with ADEC under the Defense States Memorandum of Agreement on cleanup actions at the 11 Umiat test well sites. BLM is identified as the landowner in our records, and as such is identified as a potentially responsible party in addition to the Department of Defense: C Umiat Test Wells 1-11 (File # 335.38.001) The information contained in these files is part of the public record. Our databases are accessible on the Internet at: http://dec.alaska.gov/spar/csp/db_search.httn Additional Actions Needed ADEC sent a letter on July 11, 2013, identifying an additional 15 legacy well sites with confirmed releases (enclosed). As stated in the letter, ADEC recommends that BLM develop a plan to address known, suspected, and unknown releases at the legacy well sites, in coordination with the appropriate regulatory agencies. We expected a response to this letter before now. Please respond to this letter within 30 days. After we receive and review your response we will determine what additional actions will be taken regarding each site with known or suspected contamination. In addition, with your response, please complete and return the enclosed questionnaire requesting more information about past operators. In accordance with Alaska Statute Title 46, ADEC is authorized to provide regulatory oversight for any contamination response efforts initiated by the responsible party. However, if response actions by the responsible party are not satisfactory to ADEC, we may then assume the lead role in the investigation and cleanup efforts. In the event that State response actions are necessary, the responsible parties may be held financially liable for any response actions taken by the State. Alaska Statutes 46.04.010 and 46.08.070 establish cost recovery procedures for certain costs, including oversight activities, incurred by the State in responding to pollution incidents. If you are determined to be a responsible or liable party, ADEC may bill you at a later date for our expenditures associated with this pollution incident. Expenses for which we may seek reimbursement include: Staff time associated with general or technical assistance; work plan review; project oversight; general project management; legal services; interest; travel; equipment and supplies; and any contracting costs. Pursuant to Alaska Statute 46.08.075, the State may also file liens against all property owned by a person who is responsible or liable for State expenditures. Please respond in writing within thirty (30) days from the date of this letter addressing your intended actions with respect to this pollution incident. If you believe someone else is responsible for this pollution incident (e.g., a past owner or operation of the site) or if you have any questions concerning this matter, please contact Mr. Fred Vreeman at (907) 451-2181. The attached "ADEC Information Request" describes the minimum information expected in your response. Additional information may needed to evaluate the risks and responses required at each legacy well site. Sincerely, Fred Vreeman Environmental Program Manager G:\SPAR\CS\Contaminated Site Files (38)\320 National Petro Reserve Area\320.38.010 NPRA Legacy Wells General\2-2-2014 Letter\PRP Letter All Wells.docx Wayne Sveinoha Enclosure: 0 3 • ADEC Information Request Concerning Contaminated Sites BLM Legacy Wells Dispute letter date July 11, 2013 February 4, 2014 cc: Bud Cribley, Director, Bureau of Land Management Steven Cohn, Deputy Director, Bureau of Land Management Jolie Pollet, Branch Chief, Bureau of Land Management Robert Brumbaugh, Geologist, Bureau of Land Management Michael McCrum, Environmental Engineer, Bureau of Land Management Larry Hartig, Commissioner, Alaska Department of Environmental Conservation Lynn Kent, Deputy Commissioner, Alaska Department of Environmental Conservation Kristen Ryan, Director, Alaska Department of Environmental Conservation Lori Aldrich, Program Manager, Alaska Department of Environmental Conservation Steve Bainbridge, Program Manager, Alaska Department of Environmental Conservation Jennifer Roberts, Program Manager, Alaska Department of Environmental Conservation ADEC Response Fund Administration GASPAR\CS\Contarr nmted Site Files (38)\320 National Petro Reserve Area\320.38.010 NPRA Legacy Wells General\2-2-2014 Letter\PRP Letter All Wells.docx 0 0 ADEC INFORMATION REQUEST Concerning a contaminated site(s) Re: Legacy Well Sites in and near the National Petroleum Reserve, Alaska (NPRA) Please precede each answer with the number of the question to which it corresponds. Please direct any questions concerning this information request to Fred Vreeman, Contaminated Sites Program, 610 University Avenue, Fairbanks, AK 99709; Phone: 907-451-2181. Thank you for your cooperation. 1. Provide name and company affiliation of the person answering the questionnaire. 2. Provide copies of all studies, reports, and supporting information (including preaquisition assessments and work done on behalf of other parties) which you have knowledge of which address past and/or present environmental conditions at the site. Identify the name, title, address, and phone number of the party(s) who are responsible for preparing the studies or information. Information which has been previously submitted to ADEC need not be submitted again (unless specifically requested in a subsequent communication) if you can provide the name of the office (and name and title of the DEC officer if known) to whom the report was previously provided. 3. Provide a description of any ongoing or planned investigations or cleanup work at the site. Identify the names, titles and phone numbers of the individuals responsible for preparing the studies or information. 4. Provide a description of known releases at the site (date of occurrence, quantity released, type of substance released, etc.) and a description of corrective measures that were taken. Provide information on any suspected releases which may have or are occurring. 5. Describe the nature of past and present operations at the site. In particular, any actions that may have caused the release or threat of release at the site. Describe the physical characteristics of the site including major structures, water wells, fuel or waste storage systems, drainage or septic systems, etc. 6. Provide a list of any permits issued by the Department which relate to activities at the site and a list of RCRA identification numbers (U.S. EPA identification numbers) which may be held. 7. Identify persons to whom you leased all or a portion of the property and describe the nature of their operations. 8. Identify the person(s) who used the site for disposal of substances deposited there, if any. 9. Provide copies of manifests for any hazardous waste and/or petroleum contaminated materials taken to or from the site. 10. Provide a list of persons and their phone numbers and addresses of persons who have knowledge about the use of hazardous substances at the site. 11. Provide information regarding the existence of insurance coverage for damages resulting from releases of hazardous substances and copies of all such insurance policies, both currently in effect and in effect during the periods of activity in question. 12. Describe the acts or omissions of any person, other than your employees, agents, or those persons with whom you had a contractual relationship, that may have caused the release or threat of release of hazardous substances at the site. a. In addition, describe all precautions that you took against foreseeable acts or omissions of any such third parties. 13. Describe the care you exercised with respect to the hazardous substances found at the site. 14. Describe the physical characteristics of the site including structures, wells, drainage systems, etc. THE STATE July 11, 2013 'ALASKA GOVERNOR SEAN PARNELL Wayne Svejnoha Supervisory Minerals & Energy Specialist 222 W 7th Avenue, #13 Anchorage, Alaska 99513 Re: BLM Legacy Wells Dispute Dear Mr. Svejnoha: Department of Environmental Conservation Division of Spill Prevention and Response Contaminated Sites Program 610 University Ave. Fairbanks, Alaska 99709-3643 Main: 907.451.2181 Fax: 907.451.2155 The Alaska Department of Environmental Conservation (ADEC) — Contaminated Sites has reviewed the National Petroleum Reserve in Alaska: 2013 Legacy Wells Summary Report dated February 2013, containing updated information on the status of the 136 Legacy Wells located in the National Petroleum Reserve — Alaska (NPR -A), and the draft National Petroleum Reserve in Alaslm. 2013 Legacy Weiss Strategic Plan dated May 2013. ADEC has also reviewed the response by the Alaska Oil and Gas Conservation Commission (AOGC). We concur with the response by ACIGC and have no further comment regarding the priorities. We do have comments about the investigation and cleanup plans presented in the report. With this letter we arc outlining regulatory requirements related to the environmental work that is proposed and required as part of these cleanups. ADEC is concerned that the 2013 Legacy Wells Strategic Plan prepared by the BLM does not include either assessment of the contingency for assessment of known, likely, or unknown but possible contaminant releases. In addition, BLM plans for surface cleanup of these wells should be made clear in the plan. At least one of these legacy wells has extensive PCB contamination and has resulted in a multi-year cleanup totaling tens of millions of dollars. At others, solid waste disposal practices have resulted in releases to the environment with estimated cleanup costs in the hundreds of millions. Known releases documented in the records we reviewed include crude oil, gasses, refined oil and fuel, drilling fluids that include various organics, metals, and other chemicals, and unknown contaminants from drums and other containers observed to be damaged and abandoned at the various well sites. There are 13 legacy well sites with known releases currently on the DEC contaminated sites list. Many of these are in the process of being addressed, cleaned up, and closed. From our Waited records review there are 15 additional legacy well sites with confirmed releases. These should be prioritized for initial records reviews and then added to the BLM contaminated sites list under our cooperative agreement. Suspected releases include fuel releases from operations, storage, and fuel spills at the sites, impacts to various surface water bodies from spilled fluids during drilling and breaches of containment at reserve and flare pits, continued surface runoff from drilling fluids uncontained at several sites, and down -hole substances that were ejected from the holes over time or during blowouts or drilling operations. 1 Wayne Sve noha ? July 11, 2013 Y The.BLN-1 plan to address these known, suspected, and unknown releases at legacy well sites is notably absent from the documents presented to date. The three primary regulatory agencies that need to be involved in the plan are ADEC — Contaminated Sites, Alaska Oil & Gas Conservation Commission, and ADEC — EH/Solid Waste. Other agencies will need to be consulted. as well. Below we provide recommendations for a coordinated plan using the Uniform Federal Policy for Quality Assurance Project Plans (UFP-QAPP) that will involve all of the regulatory agencies in one coordinated manner. This will allow BLM to address these sites in a consistent and coordinated project which fulfills all of the regulatory requirements so that the sites do not need to be re -visited in the fu=e xvhen they are closed after this project. Attached are our comments on each specific well. The acronyms used on the list include terms that are typically used in a CERCLA type investigation however they are also suitable for investigations conducted under the State of Alaska cleanup rules. These include the following; Historical Records Review (HRR) 'chis is recommended for almost all of the well sites. Much of the information required for these reviews is already contained in various reports and appendices or in BLM files. The Historical Records Review should document the type of releases that might have occurred from drilling operations as well as historical use of the site, and should capture all available information on the drilling fluids used and any product produced or released. Preliminary Assessment (PA) This is recommended for almost all of the well sites. A Preliminary Assessment is a limited scope investigation that provides an assessment of information about a site and its surrounding area to distinguish between sites that pose little or no threat to human health or the environment and sites that require further investigation. The PA is a CERCLA defined document and typically does not require sampling. Site Inspection (SI) If the PA recommends further investigation, then an SI is necessary. The SI is a CERCLA defined document, and it is analogous to an initial report of contamination under state cleanup rules. On some legacy well drillings sites it is evident now that an Sl is required just from a review of the reports. An SI investigation typically includes the collection of samples to determine what contaminants are present at the site and whether they are being released into the environment. An approved site specific workplan is required under both CERCL-A and 18 AAC 75 prior to SI sampling. The SI typically is not intended to develop a full site characterization, but is limited to determining the presence or absence of a release. If contamination is found after completion of the HRR, PA, and SI then a RI/FS under CERCLA, or a Site Characte-rizatiowlteportandcleanup-Alas,under-l-fi-AAC7iis`required. -- ----- - -- — --------- - DEC recommends that BLM incorporate into the strategic pian the processes outlined in this letter. A team of agencies composed of AOGC, DEC -CS, EPA as required, and DEC -EH should address regulatory and technical requirements for these well closures. By cooperating and working together with the regulatory agencies BLM will save time and expense, and regulatory uncertainties will be avoided. The strategic plan should reference a project to prepare a generic workplan. DEC suggests that BLM utilize the generic UFP-QAPP workplan format for the required environmental work. If properly prepared, the workplan could encompass most of the investigations and cleanups required at these sites over multiple years. At other multi -site projects we have found this to be an effective way to reduce uncertainties and risk in these types of investigations. A very small site specific FSP could then be developed as BLM approaches each drilling site. Regulatory decisions made during workplan development would provide more certainty in the planning process for cleanups. G:\SPAR\CS\federal F2cilitie3\Ci%ih2n 1-cdcrrt Agr=ics\DOl\B[.nl\1'roiens\lxgAey Wells\7 11 13 Luter to KIN on lxbxy wells.doex Wayne Svejnoha 3 0 July 11, 2013 Please review the attached list of specific sites. If you have any questions, please do not hesitate to call me at 907-451-2181 or by email at fred.vreeman@alaska.gov. I look forward to working with you as the Federal Government fulfills its requirement to clean up these well drilling sites in Alaska. Sincerely, y' Fred Vreeman Environmental Program Manager Enclosure: SPAR Response with Legacy Wells cc: Bud Cribley, State Director, Bureau of Land Management Steven Cohn, Deputy State Director for Resources, Bureau of Land Management Jolie Pollet, Branch Chief, Bureau of Land Management Robert Brumbaugh, Geologist, Bureau of Land Management Michael McCrum, Environmental Engineer, Bureau of Land Management Cathy Foerster, Commissioner, Alaska Oil and Gas Conservation Commission Larry Hartig, Commissioner, Alaska Department of Environmental Conservation Kristen Ryan, Director, ADEC Division of Spill Prevention and Response Steve Bainbridge, Program Manager, ADEC Contaminated Sites Program Jennifer Roberts, Program Manager, ADEC Contaminated Sites Program GASI'AR\CS\Fedcrrl Fo61ibLy\Gvi6n Falctul AgcnnCs\DOI\BI.N1\Proitcts\lA'6.1' q W03\7 11 1314tur to Aim\I on Ug2cy Wclls.doex Well Name operator I RP I Land Simpson Core Test #5 1! Na 1 BLM Simpson Core Test #6 US Na I BLM Simpson Core Test #7 us Na 1 Bl. M Sin son Core Test 98 US Navy 113LM Si son Core Test #9 U5 Na I BLM Sinwson Core Test #1f) U.S Navy! BLM Core Test #11 AOGCC Subsurlaca I BLM Core Test #12 FUSNa a I BLM Core Test #16 a 18LM Core Test #17 US Na 1 BLM Core Test 018 US Na I BLM Core Test #19 US Na 1 BLM t Core Test #20 US Navy 1 BLM i Gore Test #21 2S Na 1 BLM I Core Test #22 US Na 111•LM I Core Test dnlf fluids left in hole i BLM Core Test �#2vy I BLhA n CareTest #25 US Na Y I BLM K Core #1 US Navy i BLM 1 -t- *1 SPAR Response with Legacy Wells Lisl.xlsx 2013 Risk Ity CSP Status I Fito tllHazid Rolea5e7 Nnne None IYOMWil Low RNooe ane Nona Unused, Unused. I None Unused, i None Uncased, None None None None (None Unknown Unknown Page 1 of 14 •I AOGCC Subsurlaca AOGCC Surface SPAR W arkgroup Notes Status Status Need HRR, PA, S1 no data no data Need HRR. PA. SI no data no data Need PA ind drill fluid assessnsenl & workplan drillin 11uids left in hole no data Need PA ind drill fluid assessment & work an drilling fluids left in hole no data Need PA incl drill Ifusd assessment & work Ian dnlf fluids left in hole no data Need PA nc drill fluid assessmcnf &work Ian dnllxs fluids left rn hale no data well skc-lch provided by Need PA ind drill fluid BLM not consistent with assessment & work Ian AOGCC or BLM data no data Need PA ind drill fluid assessment & work Ian dnflin fluids left in hole no data Need PA and 51 ind 13611 fluid assessment. workplan rid sampling stressed debfis, partially as blowout and fire rove elated site areas Need PA incl drill fluid assessment & workplan dn lling fluids left in hole no data geed PA ind drill fluid assessment & wOTk Ian drij I ing fluids teff in hole no data Need PA incl dfifl nutd assessment & work Ian drillin fluids left m holo no data Need PA incl drill fluid assessment & work Ian drillin ituids left in hole no data Need HRR. PA, SI no data no data Need PA incl drill fluid assessment & work Ian drillin fluids felt in hole ria data Need PA incl dnll fluid assessment & work larx drillin fluids left in hole no data Need PA incl drill fluid assessment & work Ian drillin fluids Teff in hole no data Need PA ind dnll fluid drflfing fluids and ball assessment & work len peen hammer left in hole no data overshot, drill collar, rock revegelated —131 Need HRR, PA bit, and N -reds left in hole can't find it Review Report as PA. No evidence of sheen, stressed veg, or drilling Not abandoned, waste on surface. Veg ----_— , ,raw,, plunaed to surface site not cleared •I SPAR Response with Legacy Wells LisLxlsx Page 2 of 14 is • vi nce o BLM 2013 Risk Historic AOGCC Subsurface AOGCC Surface Well Name Operator I RP I Land Mgr Priority CSP Status file #IHazid Release? SPAR Workgroup Notes Status Status plugging operations inadequate and Wellhead tell as Umiat 43 US Navy I BLM I FUDS None pending dos 335.38.00113092 Yes. see file 'Plugged by BLM in 2004 incomplete historic site? plugging operations inadequate and Wellhead left as Umiat #4 US Navy I BLM / FUDS None pending dos 335.38.001!3079 Yes, see file Plugged by BLM in 2004 incomplete historic site? plugging operations inadequate and Wellhead left as Umial 98 US NaMy I BLM I FUDS None pendinq dos 335.38.001/3D81 'Yes, see_ _file Plugged BLM in 2004 incomplete historic sile? plugging operations inadequate and Wellhead left as Umiat #1'0 US Navyj BLM_I FUDS None pendingdos 335.38.00113082 Yes, see fila Plu ed by BLM in 2004 incomplete historic site? Need HRR, PA, SI with sampling. Drilling mud assessment. Surface Plugged to 7868'. Drilling Cleanup. Photos - evidence mud and diesel to Awuna #1 USGS I BLM Medium None None Yes of erosion into lake surface. > 100 _Pylons Need HRR, PA, SI with sampling. Drilling mud Wood , metal, assessment. Surface Plugged to 2039'. Diesel plastic debris. Fast Simpson #1 USGS I BLM Low None None Yes Cleanup. to surface. >10D Pylons Need HRR, PA, SI with Wood and metal Drilling mud assessment debris. Pylons - Photos straw areas of no Plugged to 2047'. Diesel Tankage for lk ' #1 USGS / 8LM Low None None Yes ve elation. to surface. flammable fluids Need HRR. PA, SI wdh sampling. Drilling mud assessment. Surface Plugged to 1400'. Drilling Wood and metal Koluktak #1 USGS I BLM Low None None LYes Cleanup. mud & diesel to surface debris Pylons Need HRR, PA, SI with sampling. Drilling mud assessment. Surface Plugged to 1894'. Diesel Wood and metal Ku am 91 USGS I BLM Low None None Unknown Cleanup. to surface debris. Pylons Need HRR, PA, Sl with sampling_ Drilling mud assessment_ Surface Plugged to 4464'. Drilling Wood & metal Kuyanak #1 USGS I BLM Low None None Yes Clean mud & diesel to surface debris. Pylons Need HRR, PA, SI with sampling. Drilling mud assessment. Surface Cleanup. Photos show Plugged to 1840'. Diesel Plastic and metal Lisburne 41 USGS I BLM Low None None Yes stained soil to surface debris. Need HRR, PA, SI with sampling. Drilling mud assessment. Surface Plugged to 8192'. Drilling Wood and metal North Iii ok $1 USGS I BLM Low None INone Yes Cleanup. mud & diesel to surface debris - Page 2 of 14 is • Well Name Peard South Meade #1 1 RP 1 Land 1BLM BLM #1 4USGS ! BLM SPAR Response with Legacy Wells Usl.xlsx ;013 Risk &W CSP Status File XlHazkl T Page 3 of 14 AOGCC Subsurface AOGCC Surface WAR Workgroup Notes Status r Status � deed HERR, PA SI with iampling. Dining mud rssessment- Surface ;leanup. Site photos show areas of stressed iegetalion. No issues Plugged to 2232'. Diesel Wood and metal soled in USGS re ort. to surface debris. Pylons Need HRR, PA, SI with sampling_ Drilling mud assessment Surface Plugged to 2026'. Diesel Wood and metal Cleanup. to surface debris. P Ions Add to She list. Need HRR, PA, SI with sampling. Drilling mud assessment. Surface Cleanup. Od reported bubbling to the surface within reserve pit in 1982. Oily residue and sheen observed adjacent to east side of reserve pil, down hole material at the Plugged to 1875. Diesel Wood and metal surface to surface debris. P ons Add to Site list. Need HRR, PA, S) with sampl'uig. Drilling mud assessment - Surface Cleanup. Reserve pit berm had breaches anowirrg water to exit. Oil - stained sediment was observed above the Plugged to 1478'. Diesel Wood and metal waterline of the I. to surface debris. Site photos may show hydrocarbon sheen on Plugged to 2600'. Drilling Wood and metal water in well cellar mud & diesel to surface debris. Pylons Add to Site list. Need HRR, PA, SI with sampling. Drilling mud assessment. Surface Cleanup. Berms have been breached an allow water to flow out of reserve piUllare pit. Rising bubbles of ail observed in Hare pit 1484. Photos Show Plugged to 1825'. Diesel Metal debris. ra.. v-1 v.nnnralinn to Surface ... 0 •I SPAR Response with Legacy Wells Lisl.xlsx Page 4 of 114 0 0 vi encs o BLM 2013 Risk Historic AOGCC Subsurface AOGCC Surface Well Name Operator 1 RP f Land Mgr Priority CSP Status File #fHazld Release? SPAR Workgroup Motes Status Status Need HRR, PA, Sl wrlh sampling. Drilling mud assessment Surface Cleanup. Breaches in bemi allow water to flow into and out of reserve pit, sheen on Plugged to 2700' Diesel Wood and metal West Dease #1 USGS l BLM Low Nona None Yes surface water in well cellar to surface debns. Pylons Add to Site list. Need HRR,. PA, SI with sampling. Drilling mud assessment. Surface Cleanup. Water flows into the pits through breaches on the eastern berm and out of the pits through breaches on the northern and western berms. Downhole material Plugged to 228'9'. Drilling Wood and metal South Harrison Bay #1 USGS f BLAB Low None None es Present at surface mud & diesel to surface debris. Add to Site list. Need HRR, PA, SI with sampliing. Drilling mud assessment. Surface Cleanup. Stressed vegetation noted and apparent in site pholos. Plugged to 2443'. Drilling West Fish Creek #1 USGS 1 BLM Low None None Yes Drilling mud around well mud & diesel to surface Pylons Need HRR, PA, SI with sampling. Drilling mud assessment, Surface Cleanup. High TPH Plugged to 1977'_ Drilling wellhead sticking concentrations underneath mud under plugs. Diesel up. Wood debris. Fast Simpson #2 USGS 1 BLM I Low _ Active 300.38.10912691 Yes, see file the rig inundation to surface Pylons South Barrow 94 US NavyiNorth Slope Bono None None None Unknown Need Surface Status completed gas well - no data South Barrow #5 USAF - BLM Unknown None None None. Unknown Need Surface Status completed gas well no data South Barrow #& US Na /Norlh Sto Burg None None None Unknown Need HRR, PA, St no data no data South Barrow #9 US NavyfNarih Slop2 Boro None None None Unknown Need HRR, PA, Sl no data no data _ South Barrow #10 US Navyfflorlh Sto Bora None None None Unknown Need Surface Status com ted gas well no data South Barrow It12 US Na /North Slope Baro None None None Unknown Need HRR, PA. Sl no data no data BLM well skMh not consistent with AOGCC South Barrow #14 US NavyMorth Sloe Boro None None one Unknown Nsed HRR. PA, St data no data Need PA ind drill fluid well left filled with drilling South Barrow #16 US NavyiNotih Slope Bora None None None Unknown assessment & workplan mud and diesel no data Need PA incl drill !turd tubing in well. no perfs, Soulh Barrow 017 US Na /North Sloe 13ora None None None jUnknown assessment & work fan I unknown fluid, I no data Page 4 of 114 0 0 SPAR Response with Legacy Wells Lisl.xisx Page 5 of 14 •I E CYfuu .v v AOGCC Subsurface A Surlaco TEHILM T013 Risk CSP Stilus File #IHaaid Historic Rekeasa7 SFAR YUnrkgroup Nates 5latus at US $1<ntus Well Name flperatar f RP f Land Mgriority Unknown Need Surface Status corn feted as well no data 5aulh Barrow #18 US Na INorlh Slo a Bora None None None Unknown Need HRR, PA, St no data no data Walak a #1 USGS! Unknown None None None rsg 890`. Multiple cement plugs of unknown volume. Shallowest None None Unknown _ Need HRR, PA, SI SOD' no dada Gubik #1 US Na d Ur#cnown Low Add to Site list. Need HRR. PA. SI with sampling. csg Q SOD' Well blowout Drilling mud assessment. from zone al 1SOT during Surface Cleanup. Photos plugging operations show disturbed/ slashed Plugging never completed after blowout. no data Gub* #2 US Na ! Unknown Low None Nora es areas two downhole Dement plugs of unknown depth Mone None Unknown Need MR. PA. Sl and volume no data Grandstand #1 US Navy 1 Unknown None Add to Site list. Need HRR. PA, SI with sampling. Dnliing mud assessment. Surface Cleanup Sediment from the reserve pit was excavated and spread over the pad to drill a 2nd well at this location, Upon completion of the 2nd well. the sediment was pushed back into ft reserve pit.. Area does not appear to be revegetaling. perhaps from the presence property plugged but no of drilling mud at the data on abandonment None None Yes surface status no data W 7 Foran #1 " USGS I Unknown Low on Site list. Need HRR, PA, SI with sampling. Drilling mud assessment. Surface Cleanup. Slressed vegetation, photos show plugged, but not open csg; metal & Active 306.3$.108f2689 Yes. see file site underwater abandoned at surface corwsele debris under 5' of water, Cape Halken #1 " US Na (Unknown Low None Unknown !Need HRR, PA. SI es to 27' open C_s Min a Veloei #1 U5 Na f t3LM one None csg @ 31" 280' of drill pipe, drill collar, and Core Unknown Need HRR. PA, SL barrel left rn hole. rove etaled Ournalik Core #i US Na / BLM None -No obsery None !None Page 5 of 14 •I E SPAR Response with Legacy Wells Lisi.xlsx Page 6 of 14 • • WI F3nCe Q BLM 2013 Risk Historic AOGCC Subsurface ADGCC Surface Well Name Operator t RP I Land Mgr Priority CSP Status File #IHazid Release? SPAR Workgroup Notes Status Status Need HRR, PA, Workplan for St with Sampling. Drilling Mud Assessment. Surface Cleanup. Photos show debris, stressed No csg. 15' of drift pipe Oumalik Caro #2 US Navy 1 ULM Low None None yes ve elation and rock hit left in hole. no data Need HRR, PA, Workplan for Si with Sampling open csg & other Drillip) Mud Assessment. piping sticking out Surface Cleanup_ Reports of ground; wood, of debris, drilling muds on melat, conciele Oumalik Core 011 US Navy 1 BLM Low None None Yes surface (__q to 9', debris open csg sticking out of ground; wood & metal 0umalik Core #12 US Navy I BLM Low None None No Need HRR, PA, SI no data —__—debris _„ debris buried by landslide. Need HRR, PA, St, Well not no dala on Sentinel Hill #1 US Navy 1 BLM Low None None Unknown ap panent in site Rholos Csq to 3t1'. underwater status Need IQR, PA, SI. No evidence of sheen, open crag slightly stressed veg, or drilling above ground waste on surface. Veg 37' of csg, drilling fluids level; wood and S imp son Core Test #1 US Navy 1 BLM Low None None No appears healthy lett in hole metal debris Need HRR, PA, St. No evidence of sheen, stressed veg, or drilling waste on surface_ Veg 76'01 Csg, drilling fluids Simpson Core Test #2 US Navy I BLM Low None None No appears healthy left in hate no data Need HRR, PA, Sl. No evidence of sheen, stressed veg, or drilling waste an surface. Veg 61' of csg, drilling fluids Sim sun Core Test #3 US Navy I BLM Low None None No appears healthy left in hole no data Need HRR, PA, St. No evidence of sheen, stressed veg, ordrilling waste on surface. Veg --60' of crag, drilling fluids Sim eson Core Test #4 US Nayy t BLM Low Norse None No apecars healthy left in hole no data Need HRR, PA, St. No evidence of sheen, stressed veg, or drilling waste on surface. Veg csg cemented @25% open csg sticking Songsoncore Test #13 US Na 1 BLM Low None None No appears health dritin fluids IeR in hole_ out of round Need HRR, PA, SI. Vegetated, no evidence of crag cemented @2D'; open csg sticking Simpson Core Test #14 US Navy ! BLM Low None None No release. drillin fluids left in hole out of ground Page 6 of 14 • • SPAR Response with Legacy Wells Lisl.xlsx ism son Core Fest #26 t=vrdence or Medium AOGCC Subsur(aen ADGGC Surface 13LM 2013 Risk CSP Status File WHazid Historic Retease7 SPAR Wwkgroup Notes Status Status Well Name operator r RP 1 Land Mgr Priority Unko Need HRR, PA. SL US Na ! $LM open casing None Nave Vegetated. no ev4dence of cog set shallow; drilling slicking nut of Low No release- fluids left in hole round Simpson Core Teri #14a US Na !BLM Low None None & weilhead slick Need HRR. PA, SI crude nil left in hole open casing Need HIR, PA, Workplan Vegetated, no e+wdence of csg cemented 12181; slicking out of openregd ng No release. drillingfluid left in hole round Simoson Care Tesl #15 US Na !BLM Low None None d wooden Oellar, Need HRR, PP, SL Sate a9 r�110'. dolling fluids wood 8 metal ism son Core Fest #26 US Na ! BLM Medium None None res Sim sen Core Test 027 US Na J 13LM IJone None None Unko Sim son Gore Test #28 US Na ! $LM Low None Nave Yes clmnnnn Core Tesl #29 US Navy! BLM Low Norte No No Simpson Core Test 030 US Na 1 !BLM Core Test #30a JUS,Navy 1 BLM Low `None Prone n Gore Test #31 JUS Navy/ BLM None Page 7o(14 photos appear to show oil at surface, from a natural csg Q 350'. Completed in oil seep, seep, also drilling mud in oil well Open perfs. At 1welhead sticking sacks on the tundra one lime capable of up_ metal debris PI u ed b BLM in 2004. unassisled flow. and rustingbarrels 'Need HRR, PA, St. Site photos appear to show Oil csg cemented at surface, from a natural @i02;dnllutg fluids nn oily ground; csg seep- Plugged by BLM in including diesel and & weilhead slick vin 20014 crude nil left in hole out of ground Need HIR, PA, Workplan for Sl with Sampling- openregd ng ❑rilling Mud Assessment . out grouunnd in Surface Cleanup. Site d wooden Oellar, photos appear to show a p le of drilling mud about a9 r�110'. dolling fluids wood 8 metal 160 feel tram the welt tell in hole debris. Solid waste Need HRR, PA, Sl_ No evidence of sheen, stressed veg, or dri" waste on surface. Veg csg cemented at 1S2'; open csg. Wood a ears healthy dnknq fluids lett in hole and metal debris Need HRR, PA, SI. frilling mud at surface. but well is also in the middle of a large in oil seep; Open oil seep and surrounded by cog sticking up; pooled oil. Plugged by BLNI csg cemented A150'; wood & metal ser Holes in 20514- drillin fluids left in hole detail on oily ground; tog Need HRR. PA, Sl. Well is wellhead slick in the middle of a large oil seep and surrounded by csg cemented at 100% out of ground. pooled oil. Plugged by 131. dulling mud left in hole. wellhead leaking see noses in 2004 gas blowout at 423' gas Need HRR, PA, St. Leaky valve replaced in 2001, little evidence of contamination following valva on city ground; reg replacement- Plugged by csg cemented at 100'; & wellhead stick see notes BLM in 20174 iddifing fluids, left in hole out o1 round SPAR Response with Legacy Wells List.xlsx Page 8 of 14 • • yr enco o BLM 2013 Risk Historic AOGCC Subsurface AOGCC Surface Well Name Operator f RP f Land Mgr Priority CSP Status File glHasid Release? SPAR Workgroup Notes Status Status Need HRR PA, Workplan csg Cemente=d al for Sl with Sampling. 1028', cement plugs a1 Drilling Mud Assessment. 6387' and 5520'. Fish in Surface Cleanup. Drilling hole, drilling fluids Iefs in No data. Open Simpson Test Welt #1 ak US Navy1 BLM Low None INone yes muds near wellhead hale casing Need HRR, PA, Workplan for Sl with Sampling. Dolling Mud Assessment. Surface Cleanup Also Wellhead sticking evidence of a natural seep- above ground, Tar sheens in the summer ST from 2552 to 3018. wood, melel, and months. BLM is concerned csg @2915. Slotted liner concrete debris. Fish Creek #1 US Navy I BLM Medium None None Yes about exposure to wildlife to TO. Completed oil well Rusting barrels Need HRR, PA, Workplan for SI with Sampling. rasing cemented at 48; Drilling Mud Assessment. gas 0mv and explosion Surface Cleanup. Small gas while drilling at 863'; hole leak in wellhead flange, will Filled with fresh water to Wolf Creek 91 US Navy f BLM Low None Nano No flow if the valve iso en 330' No data. csg cemented a[ 53';hole left tilted with fresh water, Wolf Creek 02 US Navy 1 BLM Low Noire Nona No Need HRR. PA. Sl. fish in hole csg cemented at 107'; No data bridge plugs from 1447 to 1735 and from 554 to Wolf Creek #3 US Nayy I BLM Low None None No Meed HRR, PA, SI. 661, No data Add to Site list. Need HRR, PA, SI with sampling. csg slicking out of Drilling mud assessment ground with wood Surface Cleanup. Sheen on plug on top; solid surface water in well cellar, csg cemented at 30'; drill waste; wood hundreds of drums indicate pipe, drilling mud and debris; about 200 Skull Cliff Core iesl #1 US NaMy I BLM High None None Yes polential for cornlamrna[ion diesel left in hole nisling barrels Need HRR, PA, SI. Two open csg, wood drums are floating on a building; pylons; pond near the well. csg cemented at 1000', wood & metal Kaolak 01 US Navy 1 BLM t ow None jNone lNo Potential for hurried landfill. fdriltingluidsieftin hole debris Page 8 of 14 • • SPAR Response with Legacy Wells Lisl.xlsx 181-11119013 Risk Well Name Operator f RP ! land Mgr Priorlty CSP Status File 1NHazid #1 1 U Navy 19LM #1 JUS Navy/ umatik Ill US Na I BLM Low None None as[ Oumalik #i US Na !BLM Low None None #1 N East Topagoruk #1 USN l BLM Kniteblade #1 US Navy l BLM Page 9 of 14 Subsurface `AOGCC Surface SPAR Workgroup Notes Status Add to Site list. Need HRR, PA, SI with sampling. open flange Q Drilling mud assessment. Surface Cleanup. Drilling Gas well. Open ports. ground level. Mud pile overgrown with Drilling fluids and Metal & wood v , etallon and lichen tubulars lett in hole debris Need HRR, PA, SI. No evidence of sheen, stressed veg, or drilling csg cemented at 502'; open casing slicking out of waste on surface. Veg plug at 3470 to 3511'; ground. Wood appears heall drilling nuids left in hole debris. Open casing below Add to Site list. Need HRR, ground level. PA, SI with sampling- Revegetated. Drilling mud assessment. Numerous metal Surface Cleanup. Debris csg partially cemented at I support structures and drilling muds. Stressed 2762'. Plug at 2543% slicking up. vegetation Dridin mud left in hole Concrete debris, plate welded to pipe: l' of pipe rsg cemented at 1100'. sticking up - Need HRR. PA. SI. Drig fluids left in hole Wooden debris. Add to Site list. Need HRR, PA, SI with sampling. Driving mud assessment. open csg broken Surface Cleanup. Downhole material present csg cemented at 6073'. off and sticking up: at surface, area mostly original hole drilled to wood, metal, revegetated. Diesel still 7154'& junk len; concrete and other occupies the ground sidetrack hole left wilh debris. rusting dreulatioir lines. drillina fluids barrel Add to Site list. Need HRR, PA, SI with sampling. Dolling mud assessment. Surface Cleanup. Pile of tsg 10 1100'; pkig al open casing drilling muds is next to the 1049% drilling mud below sticking up. Wood, teller. No offical reserve pit plug: unknown fluids in metal, and glass noted o en hole debris. open casing Need HRR, PA, SI. BLM sticking up. Wood, stales that there was no metal, and glass debris at this site in 2012. csg cemented at 420% debris - •I 0 SPAR Response with Legacy Welts Lisl.xlsx Paye 10 of 14 0 0 w once a BLM 2013 Risk Historic AOGCC Subsurface AOGCC Surface Well Name Operator I RP f Land Mgr Priority CSP Status File #IHazid Release? SPAR Workgroup Notes Status v F Status open casing sticking up. Wood, metal, & concrete debris rusting Need NRR, PA, SI. Reports barrels. One indicate solid waste csg cemented to 45';fish marked flammable Knileblade #2 US Navy I BLM Low None None No drums in hole hazard. open casing slicking up; metal & Krideblade #2a US Navy 1 BLM Low None None No Need HRR, PA, SI. csq cemented at 38% concrete debris Need HRR, PA, SI including learning assessment. Site partially No wellhead. submerged intermittently csg cemented at 80; Metal. Solid waste North Simpson Test Wel 4 US N2n I BLM Low None None No during the summer dri0ing fluids left in hole ? No dala crude wellhead. Need HRR, PA, St. Surface csg cemented at 685'; Wood and metal Umiat 01 US Navy J BLM I FUDS Medium Cleanup co 335.38.00113090 Yes, see file Cleanup drillinq fluids left in bole debris No wellhead. Gravel pad partially csg cemented a1486; revegelaled wood Need HRR, PA, SI. Surface cement plug from 440 to debris and pipe Umiat #i t US Na I BLM I FURS Low pending dos 335.38.00113083 Yes, see file Clea 490'; sticking u csg cemented at 7206'; vVefNwad- Gravel various plugs from 8250' pad revegetaled 7 South Sirnpson 01 US Navy I BLM Low None None Yes Need HRR, PA, SI. to surface No data Add to Site list. Need HRR, PA, SI with sampling. Drilling mud assessment. Surface Cleanup. Large quantifies of ferrous oxide, zinc oxide, zinc carbonate, and barium sulfate were added to drilling muds. Stains apparent in photos. BLM field camp an site. Walls between the reserve and Pare pits have eroded. Wellhead and Water flows into surface gravel pad. ? No Wook #1 USGS I BLM Low lNone Name Yes water during break22L no data data Paye 10 of 14 0 0 SPAR Response with Legacy Wells Lrsl.xlsx BLM 2x13 Risk Well Name 10porator I RP I Land Mgr Priority CSP Status I File #IHazid Arca- Barrow Cure #1 US Na l til.M Avak 01 US Navy I BLM Barrow Bi R' #1 US Na I BLM Barrow Cafe Rig Test 91 US Na I BLM #2 I US Navy I BLM #1JUS N,a I BLM H' h NOr1e None Test Well #1 US Test Well #2 US Barrow Test Wetl #31115 Na IN©r1h Slo c Bora IAedium None None Unknown Page 11 of 14 Subsurface -FAOGCC Surface SPAR IWorkgfoup Notes Status _ ___ araiu5 Need HRR, PA, SI. Surface Cleanup, Photo CIMG0218 csg cemented at 53` shows area of disturbed tubing hung to 708': hole open casing vegetation that should be heft filled with drilling mud slicking up; wood & investi algid durin Sf and diesel metal debris open casing Need HRR. PA, St. Surface csg cemeoled at BIF. sticking up; wood & Cleanu-. lu set at 1348' metal debris Not abandoned, site not cleared, Need HRR, PA, SI. Surface open easing 7? No Cleanup no data data Not abandoned, site not eteared, Need HRR. PA, SI. 'Surface open casing 77 No Cteanu no data data Need HRR, PA, St with sampling. trilling mud assessment. Surface Cleanup. Drilling Muds on Not abandoned, site -slowly revegelatmg site not igred, More information on drilling open casing 7? No mud specifics rs being researched no data data Need 1lRR, PA, SI wdh sampling. Drilling mud wellhead leaking assessment. Surface cemented Csg to gas!? Wood & Cleanup- Cellar does not 1270;slotted liner to metal debris. Area retain water 1956': tbg to 1939 affected 50'x50' Need HRR, PA. SI. Drilling Csg cemented at mud assessment. Surface 441'.hole Iell willed with open pipe; metal & Cleanup- On mads stem water concmie debris Need HRR, PA, Sl. Drilling Csg cemented al 2260'; mud assessment- Surface periorated liner to TD. wood, metal & Cleariu . fln road s stem lin Completed well. Conerete debris Need HRR, PA, SI with sampling and workplan. Drilling mud assessment. Surface Cleanup. Drilling +csg cemented at 10461: open c5g slinking mud at surface. Sheen on hole left filled with drilling up; wood & metal surface wafer in well cell larQuids and wafer. de" 0 SPAR Response with Legacy Wells Lisl.xlsx Well Flame Operator I RP I Land Mgr BLM 201$ Risk Priority CSP Status File #ltiazid yr once oF— Historic Release? SPAR Workgroup Notes AOGCC Subsurface Salus g AOGCC Surface Status no data. Likely revegetaled. Removed from our list of wells of concern in < 50', no csg, no API#, October, 2012 Oumalik Foundation Tess A US Navy I BLM None-uncased hc None None lUnknown Need HRR, PA. not in AOGCC database Monlht Meeting no data. Likely revegetated. Removed from our fist of wells of concern in < 50', no csg, no API#, October, 2012 Cumalik Foundalion Test b US Navy I BLM None-uncased hC None jNane Unknown Need HRR. PA, not in AOGCC database Monthly Meeting no data. Likely revegetated. Removed From our irsl of wells of Concern In < 50', no csg. no API#, October, 2012 Oumalik Foundation Test A US Navy I BLM None-uncased hc None lNone Unknown Need HRR. PA, not m AOGCC database Monthly Meeting no data. Likely revegetated. Removed from our list of wells of concern in < 50', no c5g. no APF#. Odubut. 2012 Oumalik Foundation Test A US Navy I BLM None-uncased ht Nune lNone Unknown Need HRR, PA, nal in AOGCC database Monthiv Meetin no data. Likely revegetaled. Removed from our Ilst of wells of con cam in < 501, no csg, no APi#. October, 2012 Oumatik Foundation Test 0 US NavyI BLM None-uncased hc None None Unknown Need HRR. PA, not in AOGCC database Moral Meeting no data. Likely revegetaled. Removed from our list of wells of concern in < 50', no csg. no API#, October, 2012 Ournalik Foundation Test 4US Navy I BLM None4xwased h_j None None Unknown I Need HRR. PA, not in AOGCC database Month Meetin Page 12 of 14 0 Page 13 of 14 SPAR Response with Legacy Wells LrsLxisx Well Name BLM 2013 Risk Operator f RP I Land Mgr Priority Historic CSP Status Fife #IHazld Rslease7 AOGCC subsurface Status �__ - -_-�� . A013CC Surface Status no dala. Likely SPAR 1Norkgroup Nates revegelaled. Removed from our list of wells of concern in < 50'. no csg, no AP IN, October, 2012 Oumalik Foundation Test US Na!q BLM None -encased h None None Unknown Need HRR. PA. not w AOGCC database MonthlyMeetin no data. Likely revegelated. Removed from our list of wells of concern in < 501. no csg, no API#, October, 2012 Oumalik Foundalion rest U5 Na I BLM None -encased h None None Unknown Need HRR, PA, not in AOGCC database Monihl lAeeli no data. Likely revegetaled. Removed from aur fist of wells of concern in 0urn alik Foundation Test US Na 18 LM None -encased fi None None ilnknown Need HRR. PA, < 50', no csg. no API#, not in AOGCC database October, 2012 Month! Meetin no data. Likely revegetated. Removed from our list of wells of concern In < 50', no csg, no API#, October, 2012 Oumalik Foundat'Gon Test US Na I BLM None encased h Nome None Unknown Need HRR, PA, not m AOGCC database Month! Meeting property abandoned per then -applicable South Banow #7 US NEILM 2LI None None Unknown Need HRR. PA, ro erl lu ed re s no data to support proper Um -Qt 02 US N Noire Pendin Clo 335.30.001/3078 Yes, see file Plu d to surface abandonment no data to support proper Uncal #5 Ummt #9 Urrval A66 Umial #T Atiaaru Point#1 U5 US US Na I BL M US Na I BLM USGS/BLM None Pendin Hi h -PCB cleanu Active None Pendia None tPendi Mane Clo 3L5 313.00113079 335.38.00113093 Cao 335.3$.00113080 Clo 335 38 001I3091 None Yes, see file Yes, see file Yes, see file Yes. see lite No Plu ed E4 surface property plugged and abandoned pfupedy plugged and abandoned property plugged and abandoned Need HRR. PA,Plugged by properly plugged and BLM in 2009. abandoned abandonment suriaoe site rcmediated surface site remediated suriacx V le remediated surface site re medialed Page 13 of 14 SPAR Response with Legacy Wells LrsLxlsx Page 14 of 14 0 vrcTon`ce o BLM 2813 Risk Historic AOGCC Subsurface AOGCC Surface Well Name Operator i RP 1 Land Mgr Priority CSP Status File #fFlaxid Releases SPAR Workgroup Notes Status Status Add to Site list. Need HRR, PA. SI with workplan and sampling. Chilling mud assessment. Surface Cleanup. Two large breaches on the south side of the berm allow water out of the reserve pit. Plugged properly plugged and surface site Drew Point #1 USGS 1 BLM None None None Yes by BLM in 2410. abandoned remedialed On Site list Need HRR, PA, 51 with workplan and sampling. [frilling mud assessment. Surface Cleanup. In 1976 the reserve pit berm failed and dolling muds/cutlings were released onlo the Poe of Teshekpuk Lake. Plugged by BLM in 2008. Solid waste from camp aril drilling operations buried on northern portion of pad. Erosion has exposed solid properly plugged and surface site East Teshek uk #1 US Navy 1 BLM None Active - waits 3Q0.38.11012652 Ycs, see file waste. abandoned remediated Threatened by erosion. properly plugged and surface site J. W. Dalton $P USGS f BLM None None None No Plu ed b BLM in 20fl5. abandoned rernediated properly plugged and surface site South Barrow #8 USAF 1 BLM None None None Unknown Need HRR, PA, abandoned remediated properly plugged and surface sile South Bartow 911 US Na INorih Slope Bono None None None Unknown Need HRR, PA, abandoned remedialed properly plugged and surface site South Barrow 013 US Na lNerlh Slope Boro None None None Unknown Need HHR, PA, abandoned remedialed properly plugged and surface site South Barrow #15 US Na !North Sloe Boro None None None Unknown Need HRR, PA, abandoned remediated properly plugged and surface site South Barrow #19 US Na 1Nrarlh Sloe Baro None Nana None Unknown Need HRR. PA, abandoned remediated Properly plugged and surface site South Barrow 1x20 US Na Worth Slope Bora None None None Unknown Need HRR, PA, abandoned remedialed Need HRR, PA, dolling mud assessment, containment assessment, possible releases. Breaches allow wafer to flow into and aul of property plugged and surface site Watakpa #2 USGSI BLM None None lNone lyes I reserve and flare pits. labandoned irernediated Page 14 of 14 0 FINAL GEOLOGICAL REPORT ON THE STANDARD OIL COMPANY OF CALIFORNIA TIDE WATER ASSOCIATED OIL COMPANY UNION OIL COMPANY OF CALIFORNIA WELL GRAMMER NO. 1 by R. L. Hewitt (1940) SCONED OCT 0 1 2014. 4 \Uc.3-\-2S c( THE FOLLOWING REPORT HAS BEEN MODIFIED BY THE 1956 HUMBLE FIELD PARTY AND WAS RELEASED TO THE HUMBLE OIL & REFINING COMPANY BY MR. A. S. HOLSTEN, CHIEF GEOLOGIST FOR TIDE WATER OIL COMPANY, FINAL GEOLOGICAL REPORT ON THE STANDARD OIL COMPANY OF CALIFORNIA TIDE WATER ASSOCIATED OIL COMPANY UNION OIL COMPANY OF CALIFORNIA WELL GRAMMER NO. 1 1940 CONTENTS Page Summary and Conclusions . . . . . . . . . . . . . . .. . . . . . . . 1 a Favorable Factors . . . . . . . . . . . . . . . . . . . . . . . 1 a Unfavorable Factors . . . . . . . . . . . . . . . . . . . . . . 2 Introduction and Location . . . . . . . . . . . . . . . . . . . . . . . . 3 Summary of Surface Geology . . . . . . . . . . . . . . . . . . . . . . 3 Stratigraphy . . . . . . . . . .4 . . . . . . . . . . . . . . . . . 3 Structure . . . . . . . . . . . . . . . . . . . . . . . . . 5. . Geological Description of Standard Oil Company of California Well Grammer No. 1 . . . . . . . . . . . . . . . . . . . 5 Stratigraphy . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Structure . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Paleontologic Evidence, Age' and Correlations . . . . . . . . 8 Oil and Gas Indications . . . . . . . . . . . . . . . . . . . . . 9 Well Samples . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Comparison of Grammer No. 1 Test Well with Other Wells . . . . . 11 ■ i i r i i r i SUMMARY AND CONCLUSIONS Favorable Factors 1. The Bear Creek anticline is a large closed structure located on the Alaska Peninsula across Shelikof Strait from Kodiak Island. Its axis is over 10 miles long; its northwest limb is seven miles wide, and its southeast limb has a minimum width of five miles. Z. Upper Jurassic rocks are exposed on the apex and flanks of the fold. Lower Jurassic rocks compose at least part of the section at depth, but the lowermost formations are of an uncertain age. 3. The Triassic rocks are organic limestones believed to be sufficiently thick to have been the source of oil. No other possible source beds were found in the Kanatak District. 4. The Kialagvik formation (Jurassic), as exposed at Cold Bay, contains sands sufficiently coarse and porous to serve as reservoir rocks. The very impermeable shales encountered in the well and the lower Kialagvik shales at Cold Bay might act as an effective seal for oil accumulation. 5. It is believed that coarser sedimentary facies probably exist in the country between. Salmon Creek and Cold Bay. (Pauli, 1jaer( ) 6. The subsurface geology is not a4 reflection of surface conditions and structural as well. as stratigraphic oil traps may exist in other localities. 7. Strong oil seepages are active in the vicinity immediately west of Cold Bay, as well as in other parts of the Kanatak District and the country bordering the Gulf of Alaska. The strength and number of these seepages and their rough alignment makes it seem probable that oil in commercial quantities may yet be found. 8. Since the Tria:,sic is the only known source for oil in the Kanatak District, seepage oil and oil showings in the Grammer No. 1 well must have m4grated upwards and may represent the overflow of a reservoir not yet encountered. 9. As no definite age can be assigned to the lowermost section in the Grammer No. 1 well, these rocks may still be Jurassic and thus overlie the probable source beds in the Tr-?assic. -la- 1 -2- s Unfavorable Factors 1. The stratigraphic section, as exposed in the Grammer No. 1 well is considerably thicker than was estimated from surface explorations. This increased thickness may have destroyed the closure in parts of the Bear Creek anticline. 2. Large amounts, of interbedded volcanic material were encountered in the well. 3. Several sharp changes in the subsurface attitudes of the formations were observed in the well. These changes, together with the fact that the sediments in the Kanatak District were laid down under extremely unsettled conditions, makes the projection of surface information underground very difficult. 4. The formations in the lower half of the well are highly indurated, impermeable, and very difficult to drill. No forecast can be made as to the presence of an oil reservoir at depth, but the character of these rocks makes such a reservoir seem improbable. 5. The formations in the well are intricately fractured. The origin of these fractures is not certain but may lie in the stresses generated by folding or recurrent volcanic activity with accompanying earth tremors. These fractures now form an avenue of escape for either oil or gas. 6. All the oil, gas and salt water showings in the well were closely associated with the system of fractures and nowhere was oil found within the rocks themselves. 7. Any oil present in the Bear Creek anticline may now be disseminated throughout the structure, as commercial quantities were not found in Grammer No. 1 well. -2- s Final Geological Report on Standard Oil Company of California (Tide Water Associated -Union) Well GRAMMER NO. 1 By R. L. Hewitt - April 22, 1940 INTRODUCTION AND LOCATION The Standard Oil Company of California, Tide Water Associated Oil Company and Union Oil Company of California, as a result of favorable petro- leum indications obtained by geological exploration during the summer of 1937, decided to drill a joint test well on the Bear Creek Dome, Kanatak District, Alaska. The equipment, necessary to drill this well and maintain a camp, was transported to Alaska during the spring of 1938. The well was located in the valley of Salmon Creek, about 2,100 feet west and 1, 000 feet north of the southeast corner of Section 10, Township 30 South, Range 41 West, Seward Basin Meridian. This site is roughly two miles north and four miles east of the town of Kanatak, which is situated on the Alaskan Peninsula approximately in longitude 1560 West and 570 35` North latitude. Drilling commenced July 17, 1938, and was suspended for the winter on November 14, 1938. Drilling recommenced April 23, 1939 and was continued until it was suspended March 3, 1940. The well was finally abandoned at a depth of 7, 596 feet, March 8, 1940, owing to the absence of oil in appreciable quantities and the extreme uncertainty of encountering formations suitable for the accumulation of petroleum. SUMMARY OF SURFACE GEOLOGY Stratigraphy The sedimentary formations in the Kanatak District range in age from Triassic to Cretaceous. The Triassic, which is locally known as the Chinik formation, is exposed only in a narrow belt occupying the seaward end of the peninsula between Cold and Alinchak Bays. The lower Jurassic or Kialagvik formation consists of two members which are best developed along the north- east shore of Cold Bay. The upper member also outcrops along the northwest shore of Wide Bay. The upper Jurassic rocks consist of the lower, middle and upper Shelikof formations, and part of the Naknek formation. These rocks underlie nearly all of the Kanatak district and comprise the formations exposed on the Bear Creek Dome. The Cretaceous rocks, which consist of the upper part of Naknek formation, outcrop in the northwest part of the Kanatak District but are strati graphically too young to be found in the Bear Creek structure. The lower Shelikof formation is the oldest exposed in the Bear Creek Dome. It occupies a belt along the anticlinal ax -,s from a point 3, 000 feet south of Salmon Creek, to a point 1, 500 feet north of Bear Creek, except in -3- The lowermost sandstone is overlain by a zone of well -bedded, soft, dark green shale with thin interbeds of fine-grained sandstone which become prominent toward the top. Numerous yellow, limy, concretionary masses are scattered throughout. The third member of the upper Shelikof is an interbedded sandstone and shale unit in which the sandstone predominates. It has no distinctive character- istics and lenticularity combined with gradual lateral changes make its limits difficult to map over any distance. The upper member of the upper Shelikof consists of a series of well bedded, concentric -weathering, dark gray to olive-green shales which appear black at a distance. There are numerous thin, fine-grained, silty, greenish - gray sandstone interbeds. The upper Shelikof formation ranges in thickness from 3, 300 feet on the Bear -Rex Creek divide to 3, 950 feet on the Bear -Salmon Creek divide. a narrow strip at the Salmon -Bear Creek divide where it is covered with middle Shelikof. This formation is made up, principally, of lenticular, - thick, massive sandstone beds that contain local conglomerate interbeds and streaks of sandy siltstone. The greatest thickness, 550 feet, is exposed in a canyon, north of Salmon Creek and west of the anticlinal axis. It was originally estimated that 1, 000 feet of lower Shelikof remained unexposed but as none of this formation was encountered in the well, it is now considered that an unconformity of considerable magnitude lies just below the surface in Salmon Creek Valley. The middle Shelikof occupies a narrow band which completely encircles the crest of the Bear Creek anticline. It is characterized by an unbroken thickness of finely laminated, well bedded, brittle, dark brown and green shale with interbeds of harder, fine-grained, silty sandstone which becomes more plentiful towards the base. Numerous fossils occur in the upper 500 feet of the shales and are often contained in yellow lime concretions. This is a very distinctive formation, and, as the unit is inclined to slump, large landslide areas make it even more recognizable. Its average thickness in this vicinity is , 750 feet. The upper Shelikof formation has a wider distribution than any of the other Shelikof formations. It is exposed in a wide area which completely surrounds the Bear Creek anticline and extends from Portage Bay to Cold Bay. It is made up of four rather indistinct alternating sandstone and shale members along the divide between Salmon and Bear Creeks. The lowermost member consists essentially of thick, massive, locally crossbedded, friable to firm, coarse, olive -gray sandstone interbedded with streaks of sandy, brown shale and a few thin conglomerate lenses. These lenses locally form a discontinuous series at the base of the formation but are also found higher in it, and numerous fossils occur both in the reworked material and in the matrix. The sandstone of this member is characterized by numerous, well-rounded sandstone concretions. The lowermost sandstone is overlain by a zone of well -bedded, soft, dark green shale with thin interbeds of fine-grained sandstone which become prominent toward the top. Numerous yellow, limy, concretionary masses are scattered throughout. The third member of the upper Shelikof is an interbedded sandstone and shale unit in which the sandstone predominates. It has no distinctive character- istics and lenticularity combined with gradual lateral changes make its limits difficult to map over any distance. The upper member of the upper Shelikof consists of a series of well bedded, concentric -weathering, dark gray to olive-green shales which appear black at a distance. There are numerous thin, fine-grained, silty, greenish - gray sandstone interbeds. The upper Shelikof formation ranges in thickness from 3, 300 feet on the Bear -Rex Creek divide to 3, 950 feet on the Bear -Salmon Creek divide. The Naknek formation, which is the most widespread in the Kanatak district, lies along the west flank of the Bear Creek anticline. It overlies the upper Shelikof formation with angular unconformity. The base of this series consists of a massive, dark greenish -gray to black, sandy conglomerate interbedded with coarse, arkosic sandstone. The basal member is overlain by a thick series of massive, coarse, buff to light gray, arkosic sandstones and pebble conglomerates. No definite thickness for the Naknek was obtained in the vicinity of the Bear Creek anticline. IStructure The Bear Creek anticline is a well developed, broad, slightly asymmet- rical anticlinal structure. Its axis is clearly defined and trends southwest - northeast for ten miles from Portage Bay to Rex Creek. The northwest limb extends for seven miles to the edge of Becharof Lake while the southeast limb extends five miles to the shore of, and possibly beneath, Shelikof Strait. The structure plunges steeply from Salmon Creek to Portage Bay but eases off between Salmon and Bear Creeks. The northwest limb is considerably steeper than the southeast limb and the axial plane hades an average of four degrees to the southeast. The closure of the structure is estimated at 2, 000 feet, the closed area at 10, 000 acres and the drainage area at 100, 000 acres. The Bear Creek anticline is slightly complicated in the vicinity of its axis by a number of normal faults which run both parallel and transverse to the anticlinal axis. The planes of these faults are nearly all vertical and, as there is no drag folding, it is considered that the faulting took place after the forma- tions were thoroughly consolidated. The faults are all small but may have played an important part from the standpoint of oil accumulation. One of the most nota- ble of these faults is the anticlinal fault which parallels the anticlinal axis on its southeast side. The axis swings in the vicinity northeast of the Bear -Rex Creek divide and for a considerable distance near Rex Creek the anticline is faulted along its axis. The transverse faults which cut the axis are respectively the Kanatak fault, Island Bay fault, and a small unnamed fault which lies just north of Bear Creek. None of these were considered large enough to be important from a commercial'viewpoint. GEOLOGICAL DESCRIPTION OF STANDARD OIL COMPANY OF CALIFORNIA WELL, GRAMMER NO. 1 Stratigraphy Surface material in Grammer No. 1 test well, which consists of alluvial gravel, sand and clay, extends downward for 85 feet. This is underlain by the first consolidated sediments, a series of blue -gray bentonitic shales, with streaks of gray -brown shale, and fine -to medium -grained, gray sand, which extendAto a depth of 300 feet. Below 300 feet, the formation changes tQ a thinly bedded, soft gray -brown, locally limy clay -shale, with laminae of 4 The interval between 6, 480 and 7, 207 feet consists 'of alternating zones, from 20 to 100 feet in thickness, in which either ashy material or calcareous shale is the predominant constituent, but thin interbeds of limestone, calcareous shale, tuffaceous sandstone, ash, etc, may occur in either type of zone in greater or less amounts. The ashy or tuffaceous siltstones and sandstones are massive, fine- to coarse-grained, impermeable, medium hard, siliceous (con- tain glass) locally limy, or cherty, light to dark gray, greenish to brownish - gray rocks. The ash consists of massive, fine- to coarse-grained, impermeable, soft to medium hard, locally limy or siliceous, white, gray green etc. volcanic material which was undoubtedly laid down under water. The calcareous shale and bentonite which occur in this interval are similar to those described above. From 7, 207 to the bottom of the well at 7, 596 feet, the rocks are predominantly hard, tight, brownish -black, calcareous shales with streaks and interbeds of fine, gray -brown, impure limestone; fine to coarse, limy, siliceous, white to green ash, and blue -gray bentonitic shale with scattered beds of slate towards the bottom of the hole. A thick bed of very coarse, bentonite and ash, and streaks of light gray sand. These soft shales continue downward to a depth of 1, 060 feet. From 1, 060 to 3,150 feet, the formations consist, in general, of hard, laminated to compact, gray -brown, platy, silty to calcareous shale with thin streaks of decomposed ash and bentonite. The bentonite is a soft, sectile, very fine-grained, bluish -gray shale which occurs as paper -thin partings and streaks up to 4 inches in thickness. A four foot bed of hard, coarse-grained, mottled gray -blue, arkosic sandstone was encountered at 2, 823 feet. From 3,150 to 3, 250 feet the drill passed through a zone of ashy or tuffaceous material. Lithologically, these rocks are massive, poorly bedded, I fine -to coarse-grained, soft to medium hard, white, gray, sea -green, locally limy, silty and cherty ash or tuff with occasional interbeds of fine-grained, light brownish limestone. Despite the coarseness of grain, these tuffs have a very low degree of porosity and appear impermeable. Below the ash is a series of inter- bedded, fine-grained, brown sandstones and silty shales; hard, white, limy to cherty, ashy sandstone; hard, dark brown shale; and quartzite; which extends to 3, 420 feet. The formations between 3, 420 and 6, 480 feet consist of a monotonous series of thinly interbedded, impermeable, calcareous shale; limestone, bento- nite, and ash. From 4, 800 feet to 6, 480 feet there is a considerably greater percentage of bentonite and ash than in the preceding interval. The calcareous shale is the predominant rock in this series and is a massive, hard, fine-grained, dark gray -brown to bluish or brownish -black rock. The limestone is generally impure, ranges from buff to gray -brown in color, and is fine enough grained to be locally called a limy siltstone. Litholigically the ash is a massive to finely laminated, soft to medium hard, fine- to coarse-grained, locally limy, white, gray to sea -green rock. The bentonite is a soft, finely laminated, pale greenish to bluish -gray shale. Minor amounts of light gray -brown, non -calcareous shale were noted. Small amounts of both primary and secondary pyrite were found throughout these rocks. The interval between 6, 480 and 7, 207 feet consists 'of alternating zones, from 20 to 100 feet in thickness, in which either ashy material or calcareous shale is the predominant constituent, but thin interbeds of limestone, calcareous shale, tuffaceous sandstone, ash, etc, may occur in either type of zone in greater or less amounts. The ashy or tuffaceous siltstones and sandstones are massive, fine- to coarse-grained, impermeable, medium hard, siliceous (con- tain glass) locally limy, or cherty, light to dark gray, greenish to brownish - gray rocks. The ash consists of massive, fine- to coarse-grained, impermeable, soft to medium hard, locally limy or siliceous, white, gray green etc. volcanic material which was undoubtedly laid down under water. The calcareous shale and bentonite which occur in this interval are similar to those described above. From 7, 207 to the bottom of the well at 7, 596 feet, the rocks are predominantly hard, tight, brownish -black, calcareous shales with streaks and interbeds of fine, gray -brown, impure limestone; fine to coarse, limy, siliceous, white to green ash, and blue -gray bentonitic shale with scattered beds of slate towards the bottom of the hole. A thick bed of very coarse, impermeable, soft, siliceous, waterlain tuff or tuffaceous sandstone was encountered between 7, 440 and 7, 460 feet. None of the formations in the Grammer No. 1 test well exhibits a high enough degree of porosity or permea- bility to be capable of acting as a reservoir for the accumulation of oil. Structure Grammer No. 1 well was originally located with the idea that a straight hole should reach the apex of the anticline, as projected from surface infor- mation, in the Triassic formation. The surface information, however, did not hold true, as the well disclosed several unexpected dip changes and did not reveal any rocks similar to known Triassic. The dip of the formations from the surface down to approximately 1, 200 feet averaged 250. From 1, 200 to 2, 280 feet the dip ranged from 20 to 260 but the average was about 100. Flat or very low dips were encountered between 2, 280 and 5,100 feet. A very sharp steepening of the dip, although no lithologic change was noticed, occurred in the vicinity of 5, 100 feet. From this point to the bottom of the hole the dips ranged from 150 to 400 with the average dip about 250. • Totco surveys to determine the inclination of the hole were run at intervals as far down as 4,151 feet where they were discontinued for fear of losing the "go -devil" in the open hole. The results of these surveys sho•97ed. that the well swung from 1/80 to 3-1/20 from the vertical. The average inclination was approximately 20 while the last reading at 4,151 was 1-7/80. On the basis of the above information, a corrected stratigraphic section for the well was plotted. This section measured approximately 7, 210 feet which indicates a loss of roughly 380 feet, through drilling at an angle. It may be noted from the above, and assuming that the well is nearly vertical, that the dip of the formations steepened sharply in several places. The steep dips near the surface may be explained by the fact that the well was not located directly over the surface apex of the fold. The steep dips found near 5, 100 feet, after drilling through a large section showing flat attitudes, must be explained otherwise. This condition might occur if the hole had passed through an angular unconformity. Such an unconformity could be produced by a tilting of older beds before subsequent deposition took place or by the deposition of sediments on relati-rely highly inclined near -shore deposits by a transgressive sea. This environment might also cause large scale cross -bedding and lensing. Faulting could cause a discordance in the dip. No lithologic changes were noted in the vicinity of the variable dips, nor was there any evidence which might indicate faulting. It is thought, since the Kanatak district experienced rapid sedimentary changes during Mesozoic times, that the discordant dips are due to these conditions. -7- ■ ■ ■ Examination of the well samples, while drilling was in progress, revealed that the formations are nearly all fractured. The degree of fracturing became less as the well went deeper but the rocks were still broken when drilling was suspended. The fractures are larger and more open towards the top of the well, than are those at depth, which are thin and tight. They are all sharp breaks with no evidence of drag folding and apparently were formed after the sediments were consolidated. This condition may have resulted from any or all of a number of causes, such as the stresses which produced the folding and faulting or those generated by recurrent volcanic activity and earthquake shocks. Whatever their origin may have been, the fractures now form an avenue for the migration of gas, oil and salt water. Almost all these fractures are lined with white to brown vein calcite that originated from both circulating meteoric and magmatic waters. Paleontologic Evidence, Age and Correlations Fossils were found scattered throughout the cores of the Grammer No. 1 well down to a depth of 3, 000 feet. Between 3, 000 and 4, 224 feet only a very few small bivalves were collected. No fossils were found anywhere below 4,224 feet. The absence of fossils in this interval is probably due to the fact that the rocks are now well indurated and that any previously existing animal remains have been lost in the process of induration. A few belemnites, Inoceramii, Ostrea, brachiopods, ammonites and plant remains were collected from the cores down to a depth of 2,116 feet. A very fossiliferous zone containing ammonites of the Grammoceras fauna was found between 2,116 and Z,140. This fauna is a typical Lower Jurassic one and lies in the upper Kialagvik formation of the Kanatak district. A few small pectens, brachiopods, unidentified ammonites and plant remains were scattered through the rocks from 2,140 to 2, 820. Some of the plant remains were identified as Lower Jurassic species. Abundant ammonites were found between 2, 820 and 2, 924 which have been identified as the genus Arietites. This form belongs to the Lower Jurassic and is believed by Dr. G. D. Hanna to be similar to the Arietites ammonites collected from the lower Kialagvik shales a short distance above the lower Kialagvik sandstone section at Cold Bay. A few small undiagnostic pectens were found between 3, 724-30. The only other fossils collected from the Grammer No. 1 well were a few small bivalves at 4, 224 which Dr. G. D. Hanna has identified as belonging to the genus Avicula. He states that these forms cannot be considered diagnostic because the genus has a long geologic range, but that they are similar to others found in the Lower Jurassic elsewhere. From the above information, it can be seen that only a very general correlation between the Grammer No. 1 well and the type section of Kialagvik (Lower Jurassic) rocks as exposed at Cold Bay can be made. The very fossiliferous stratum found near the top of the upper Kialagvik at Wide Bay ME is absent in the well and as the lower Shelikof sandstone is also absent there, it is believed that an unconformity which cuts out part of the lower Shelikof and upper Kialagvik, is present in the Salmon Creek vicinity. Lithologically, the section encountered in the well is very different from that exposed at Cold Bay. The upper part of the upper Kialagvik shales at Cold Bay are much sandier than are those in the well. The Grotto Falls conglomerate, which is a massive boulder conglomerate found at Cold Bay, and serves as a marker between the upper and lower Kialagvik, was not found in the well. The shales between 2, 430 and 3, 800 are lithologically similar to the lower Kialagvik shales at Cold Bay but no sandstone series such as is exposed beneath these shales, appears in the well log. If the fossils found at 2, 820 feet, are equivalent to those immediately above the sandstone member of the lower Kialagvik at Cold Bay, it is seen that a large section of rocks found in the well is not present at Cold Bay. The lowest 2, 500 to 3, 000 feet of section in the well does not look like any of the exposed rocks in the Kanatak District. Its high degree of induration and larger percentage of waterlain volcanic material are two outstanding dissimilarities. However, as no sharp lithologic changes or evidence of faulting were observed, it may represent a greatly thickened section which is still of Jurassic age. It does not resemble any of the known Triassic sections, which everywhere in Alaska are very fossiliferous. A tentative correlation between this formation and a series of rocks exposed in the Nushagak District north and west of Bristol Bay has been suggested by Dr. G. D. Hanna, who visited this area in the years 1911-13 and believes they bear some resemblance. Examination of U. S. G. S. Bulletin 903 "The Nushagak District", by J. B. Mertie, Jr. reveals that a series of unfossiliferous sediments of Carboniferous age was found. They, however, have no associated volcanic material, as it appears that volcanism did not begin in the Nushagak District until Permian time. No positive age determi- nation for the lower section of the Grammer No. 1 well can thus be made at this time. Oil and Gas Indications Oil in commercial quantities was not struck in the Grammer No. 1 test well. It was observed, howearer, in small amounts throughout the greater part of the hole and on several occasions strong flows of gas and salt water created drilling problems. From almost the surface down to 3, 760 feet drilling had to be conducted with 120-129 pound mud in order to keep the salt water and gas out of the hole. A string of 11-3/4 inch casing was cemented at 1, 054 feet but it did not materially help the situation. At 3, 760 feet 126 pound mud began to migrate into the formation and as a lighter mud would not keep back the salt water, 8-5/8 inch casing was run in and cemented. This cement job shut off the water satisfactorily and the well was completed using 90 pound mud. Gas entered the well on several occasions below 3, 760 feet, causing sharp drops in the weight of the rotary mud but this usually occurred after the well had been idle for some time. _9_ In summary, it should be stated that all the oil, gas and very probably, salt water, encountered in the Grammer No. 1 test well, were closely associated with the intricate system of fractures. None of the formations were sufficiently permeable to allow the migration of either oil or gas within the rocks themselves. No highly organic stratum, suitable as a source of petroleum, was found in the well nor is any such bed known in the secti, )ns of the Kanatak District which strati graphic ally overlie the formations exposed in the well. It, therefore, seems safe to assume that whatever oil was found in the test well has migrated upwards by means of the fracture system. Owing to the uncertain character of the lowermost formations in the well, it is impossible to say whether or not an oil reservoir lies at greater depth. The high degree of induration of these rocks, however, is rather unfavorable for such a reservoir. It is possible, too, that all the oil that was ever present is now thoroughly disseminated throughout the structure. Numerous strong oil seepages, however, are active in the Kanatak District today, and others may be found at intervals in the country bordering the Gulf of Alaska, as far east as Yakutat. The strength and number of these seepages, together with their rough alignment, leads to the belief that there may be some location where oil can yet be found in commercial quantities. As to the Bear Creek Dome, itself, drilling has proven that the subsurface geology was unpredictable and that rapid sedimentary changes have taken place between Salmon Creek and the type section at Cold Bay. It is possible that oil accumulations may exist in coarser facies, formed by oscillating sedimentary conditions, in the area between these two localities. A number of oil seepages are, at present, active in this vicinity, -10- Solid hydrocarbons, in the form of gilsonite, were found quite persist- ently in the fractures in the rocks from 200 to 2,100 feet. Live oil was first observed in the fractures in the shales between 2,100 and 2, 200 feet. From this point down to 3,150 feet live oil or tarry residue was seen in small amounts in the fractures of every core. Between 3,150 and 3, 250 feet a thick series of light colored, silty ashes or tuff was encountered. These rocks were thoroughly fractured and the breaks carried both live and tarry oil and in many cases the rock itself was stained light brown by oil. Gas was observed bubbling from the fractures as much as 14 hours after the core was taken from the core barrel. A Johnston Formation Tester which was run in this formation obtained gassy, heavy mud; watery, gassy mud with oil colors; and finally muddy salt water with a scum of heavy, tarry, black oil. Small, but persistent amounts of both live and tarry oil and oil stain were observed in the fracture planes of every core between 3, 250 and 6, 000 feet. Below 6, 000 feet some of the cores appeared dry but many contained oil stain and tarry oil in the fractures. A few showed small amounts of live oil in the mud which coated the cores before they were washed. In summary, it should be stated that all the oil, gas and very probably, salt water, encountered in the Grammer No. 1 test well, were closely associated with the intricate system of fractures. None of the formations were sufficiently permeable to allow the migration of either oil or gas within the rocks themselves. No highly organic stratum, suitable as a source of petroleum, was found in the well nor is any such bed known in the secti, )ns of the Kanatak District which strati graphic ally overlie the formations exposed in the well. It, therefore, seems safe to assume that whatever oil was found in the test well has migrated upwards by means of the fracture system. Owing to the uncertain character of the lowermost formations in the well, it is impossible to say whether or not an oil reservoir lies at greater depth. The high degree of induration of these rocks, however, is rather unfavorable for such a reservoir. It is possible, too, that all the oil that was ever present is now thoroughly disseminated throughout the structure. Numerous strong oil seepages, however, are active in the Kanatak District today, and others may be found at intervals in the country bordering the Gulf of Alaska, as far east as Yakutat. The strength and number of these seepages, together with their rough alignment, leads to the belief that there may be some location where oil can yet be found in commercial quantities. As to the Bear Creek Dome, itself, drilling has proven that the subsurface geology was unpredictable and that rapid sedimentary changes have taken place between Salmon Creek and the type section at Cold Bay. It is possible that oil accumulations may exist in coarser facies, formed by oscillating sedimentary conditions, in the area between these two localities. A number of oil seepages are, at present, active in this vicinity, -10- Well Samples During 1938, ditch samples were collected every 10 feet from the Grammer No. 1 test well, dried in the basket and sacked. Coring began at 500 feet and from there on cores were taken intermittently at intervals of about 100 feet. These samples, which include all material down to 2, 430 feet, have been boxed and are now stored in the basement of the California Academy of Sciences. Below 2, 430 feet, ditch samples were gathered every foot and sacked in 5 foot lots. The coring program remained substantially the same. These samples, which include all material obtained between 2, 430 and 7, 596, are stored in the basement of the Tide Water Associated Oil Company's offices at 79 New Montgomery Street. COMPARISON OF GRAMMER NO. 1 TEST WELL WITH OTHER WELLS None of the several other wells previously drilled in the Kanatak District are comparable with the Grammer No. 1 test well. They were all located on formations which are stratigraphically younger and none of them went deep enough to encounter the upper Kialagvik formation in which the Grammer No. 1 well was begun. The only well with which a comparison can be made is that of the Iniskin Drilling Company on the Iniskin- Chinitna Peninsula in the Cook Inlet District, Alaska. The surface rocks in the vicinity of this well are of Jurassic age and are known as the Tuxedni formation. The youngest of these rocks has been correlated with the lower Shelikof of the Kanatak District. Fossils taken from this well have been correlated with upper and lower Kialagvik fossils. The formations in this well, in general, are a series of shales with some sandstone interbeds but do not include volcanic material such as was found in the Grammer No. 1 test well. The Iniskin well is now down over 8, 000 feet and it is still believed to be in the Kialagvik formation. Small amounts of oil, gas and salt water have been observed in both wells. 10 0 -12- STANDARD OIL CO. OF CALIFORNIA GRAMMER No. 1 BEAR CREEK ANTICLINE. KANATAK DISTRICT, ALASKA LOCATION - 2100' West - 1000'. North of S. E. Corner Sec. 10, T. 30, S. , R. 41 W. , Seward Basin Meridian. ELEVATION Approximately 375' COMMENCED DRILLING - 7/17/38 SUSPENDED DRILLING - 11/14/38 RECOMMENCED DRILLING - 4/23/39 PLUGGED & ABANDONED - 3/3/40 CASING DETAILS 16" Cemented at 115' 11-3/4" Cemented at 10549 8-5/8" Cemented at 37601 DESCRIPTION OF FORMATIONS DRILLED 0 - 180 Surface 180 - 200 Soft gray silty shale 200 - 255 Hard blue-gray silty shale 255- 300 Hard gray brown silty shale with brown calcite. 300- 320 Hard brown medium-grained sand. Fragments dark greenish gray quartzite. Some shale fragments. Possibly a conglomerate. 310 - 424 Hard dark gray silty shale - streaks light gray ash (?). Vein calcite scattered throughout. Occasional quartzite pebbles. CORE 4Z4- 444 31 rec. Greenish gray, hard to friable, silty shale. Occasional streaks brown medium sand. Streaks fine gray ash. (? ) Streak gilsonite Qa 427. Dip 320 -12- DRILLED 444 - 517 Hard dark gray silty shale. Occasional streaks brown medium sand. Streaks fine gray ash. Abundance of calcite. Scattered pebbles. CORE 1079 - 1089 81 rec. Gray brown silty to bentonitic shale. Fine gray partings. Calcite veins. Dips 16-290. CORE 1089 - 1109 81 rec. Soft gray brown platy shale - fine gray partings. 2 inch streak light gray sand @ 1894, 1 inch streak light gray sand with oyster shells @ 1098 Dips 250. CORE 1109 - 1130 19° rec. Gray brown - brown, thin bedded, platy shale. Partings light blue gray bentonite and light gray ash. Dips 250 . CORE 1130 - 1150 18e rec. Thin bedded, platy brown shale. Partings fine gray ash, Dips 25°. Show of gas. Sampled for core orientation @ 1135 - 1139 and 1148. 1150 - 1167 9` rec. Thin bedded, platy; brown shale. Partings fine, gray ash. Fractured with calcite fillings @ 1159. Dips 230. -13- CORE 517 - 534 129 rec. Friable, platy, gray -brown shale. Thin streaks fine light gray ash. Belemnite @ 518. DRILLED 534 - 630 Friable, fine, gray, silty shale. Calcite fragments scattered. Inoceramus fragment @ 560. Belemnite tip with oil @ 600 630 - 660 Hard, light buff, limy shale and dark gray silty shale. Some igneous pebbles., 660 - 680 Hard, dark gray, silty shale, gray and brown sand, vein calcite. Belemnite fragment @ 670 680 - 1079 Friable, light gray, silty shale. Vein calcite scattered through interval. Gilsonite @ 730 - 820 - 840 - 890. Brown fossilized wood @ 750. Belemnite fragment @ 820. CORE 1079 - 1089 81 rec. Gray brown silty to bentonitic shale. Fine gray partings. Calcite veins. Dips 16-290. CORE 1089 - 1109 81 rec. Soft gray brown platy shale - fine gray partings. 2 inch streak light gray sand @ 1894, 1 inch streak light gray sand with oyster shells @ 1098 Dips 250. CORE 1109 - 1130 19° rec. Gray brown - brown, thin bedded, platy shale. Partings light blue gray bentonite and light gray ash. Dips 250 . CORE 1130 - 1150 18e rec. Thin bedded, platy brown shale. Partings fine gray ash, Dips 25°. Show of gas. Sampled for core orientation @ 1135 - 1139 and 1148. 1150 - 1167 9` rec. Thin bedded, platy; brown shale. Partings fine, gray ash. Fractured with calcite fillings @ 1159. Dips 230. -13- DRILLED 1167 - 1262 Hard, gray brown -brown shale. Ash fragments. Vein calcite CORE I1262 - 1282 20' rec. Gray brown -brown platy shale with partings and thin streaks light gray ash. Carbonized plant remains (fern; palm). ' Brachiopod. Good 50 dips. TIRTT.T.FTI 1282 - 1381 Gray brown -brown shale. Vein calcite abundant - also fine gray ash. Occasional brown sand fragments. CORE 1381 - 1386 4' rec. Hard, gray brown, platy shale with stringers blue gray bentonite and partings fine, gray ash. Ammonite @ 1383. Dips 20 . 1386 - 1461 Dark gray - gray brown shale. Vein calcite, gray ash. CORE 1461 - 1471 9' rec. Hard, semiplaty, gray brown shale. Partings fine gray ash - slight acetone cut. Badly fractured @ 1468 with fragments shale and greenish gray sand cemented with calcite. Dips 6-100. CORE 1471 - 1482 6' rec. Hard gray brown shale. Partings fine gray ash and blue gray bentonite. Fractured with calcite fillings in fractures. Dips 5-11°. CORE 1482 - 1498 9' rec. Gray brown, hard, platy shale with partings of blue gray bentonite and ash. Belemnite @ 1489. Dips 5-100. Show of gas. DRILLED 1498 - 1696 Light gray brown - brown shale. Abundant fragments light gray ash and vein calcite. Fractures in shale @ 1570 spotted with reddish orange spots - insoluble in dilute HCL. Few fragments blue gray limestone with pyrite @ 1580. -14- CORE 1696 - 1706 4' rec; Hard gray brown - brown shale. Partings blue gray bentonitic shale. Some fracturing - calcite filled. Hard limy streak 1698. DRILLED 1706 - 1778 Hard gray brown shale. Blue gray bentonitic shale streaks. Partings fine gray ash. Vein calcite. CORE 1778 - 1800 20' rec. Hard gray brown - brown, platy - semiplaty shale and blue gray bentonitic shale (3070) Partings fine gray ash. Some fracturing with calcite fillings, but less than in previous cores. 6-90 dips. 1800 - 1886 Hard gray brown - brown shale and blue gray bentonitic shale. Partings fine gray ash. Vein calcite. Good 90 dips. CORE 1886 - 1898 9' rec. Laminated gray brown - brown shale and blue gray bentonitic shale. Some fracturing with calcite fillings. Good 9-110 dips. 1898 - 1935 Gray brown - brown shale - streaks of blue gray bentonitic shale and fine gray ash. Vein calcite. 1935 - 1938 Hard, medium -grained, dark gray sand. Flakes of gilsonite give good acetone cut. CORE 1938 - 1944 4' rec. Very hard, limy, gray brown - brown shale - streaks blue gray bentonitic shale. Dips 110 . DRILLED 1944 - 2018 Hard gray brown - brown shale with streaks blue gray bentonitic shale and fine gray ash. Vein calcite. -15- I CORE 2018 - 2030 6' rec. Laminated gray brown - brown shale and blue gray bentonitic shale. Dips 5-1/20. I• DRILLED I2030 - 2105 Hard gray brown - brown shale with streaks blue gray bentonitic shale. Both drusy and crystalline calcite. I CORE 2105 - 2116 6' rec. Gray brown - brown shale with, thin streaks blue gray Ibentonitic shale. Badly fractured - fractures filled with drusy calcite. Free oil in fractures. I2116 - 2132 12' rec. Hard fossiliferous brown shale with thin streaks blue gray bentonitic shale. Fractured and minor faulting - cemented with calcite. Free oil in fractures. - oil oozed out of core after Istanding. Ammonites very abundant. (2118-25-26-28-30). Streak fine gray sand 2130. Dips @ 2120-260, 2125-220, 2130-200. 2132 - 2140 8' rec. Hard compact gray brown shale with streaks blue gray bentonitic shale. Ammonites @ 2136, 2138. Bivalve @ 2135. Pecten @ 2139. Dips 2135-200, 2138-150, 2140-140. Note: The abundance of the ammonites, similarity of faunal assemblage to field samples and presence of Pecten tentatively place last two cores in lower portion of lower Kialagvik shale. DRILLED 2140 - 2150 Hard gray brown shale. CORE I 2150 - 2155 5' rec. Hard siliceous gray brown - brown shale. Streaks blue gray ashy - bentonitic shale. Fractured with calcite fillings. Live oil in fractures. Good 150 dips. 2155 - 2167 12' rec. Very hard, dark brown shale with streaks -blue gray bentonitic shale. Thin limestone streaks @ 2159, 2163. - Ammonite @ 2163. Fractured with calcite fillings. Lige oil in fractures. Dips 2156-240, 2160-120, 2165-90. 2167 - 2176 91 rec. Hard dark brown shale - streaks blue gray bentonitic shale. Live oil in fractures. Sampled @ 2170 for core orientation. -16- r DRILLED 2176 - 2204 Hard gray brown shale with streaks blue gray bentonitic shale. Streaks fine gray ash. Vein calcite. DRILLED , 2204 - 2228 Hard, gray brown shale with some blue gray, bentonitic shale and calcite. CORE 2228 - 2243 Hard, gray brown, semiplaty shale with streaks of blue gray, bentonitic shale. Some minor faulting and fractures filled with calcite. Dips @ 2230 - 10-1/20, 2235 - 130, 2240 - 100. CORE ' 2243 - 2260 171 rec. Hard, dark gray brown, semiplaty shale with streaks of blue gray, bentonitic shale. A 1" streak of gray sand @ 2254. Less fracturing than in previous cores. Dips @.2245-90, 2250-130, 2255-100, 2260-10-1/20. CORE 2260 - 2275 12' rec. Very hard, dark gray brown shale with streaks of blue gray bentonitic shale. Dry oil in fractures. Dips @ 2265-70, 2270-60. CORE 2275 - 2280 4' rec. Very hard, dark gray brown shale with streaks of blue gray bentonitic shale. CORE 2280 - 2282 21 rec. Very hard, dark gray brown shale with streaks of blue gray bentonitic shale. One-half inch streak of hard gray sand @ 2281. Minor faulting and fractures with calcite fillings. CORE 2282 - 2288 6' rec. Same as above core. CORE 2288 - 2292 4' rec. Same as above core. -17- DRILLED 2292 - 2309 Hard, gray brown shale and blue gray bentonitic shale. CORE 2309 - 2313 41 rec. Very hard, dark gray brown shale with streaks of blue gray bentonitic shale. CORE 2313 - 2317 31 rec. Same as above. CORE 2317 - 2321 3° rec. Same as above. 30 dip. DRILLED 2321- 2373 Hard, dark gray brown shale; blue gray bentonitic shale and vein calcite. CORE 2373 - 2375 P rec. Very hard, blue gray to gray brown shale. Pecten @ 2374. DRILLED 2375 - 2429 Hard, dark gray brown shale with blue gray, bentonitic shale, some gray ash, calcite, and dark blue gray calcareous shale. CORE 2429 - 2430 1' rec. Very hard, dark gray brown, calcareous shale. Some fracturing with calcite fillings. DRILLED 2430 - 2450 Hard, gray -brown, platy, laminated shale with streaks of very fine-grained, gray -blue bentonitic shale. Minor amounts vein calcite and coarse gray, decomposed ash. 2450 - 2465 Hard, gray -brown, laminated, platy shale interbedded with gray -blue bentonitic shale. Minor amounts vein calcite and light gray, fine -to medium -grained ash. IK -111 2465 -2505 Alternate 5' intervals of hard, gray -brown, laminated shale and dark -gray to bluish -gray dense, brittle shale which is silty and calcareous. Light gray -blue bentonitic shale occurs interbedded with both of the predominant rocks. Minor amounts of calcite and decomposed ash were found throughout this interval. 2505 - 2520 Hard, gray -brown, platy, laminated shale with laminae of gray -blue bentonitic shale. Minor amount of calcite and ash. CORE I2520 - 2523 3' rec. Hard, gray -brown, finely -laminated, shale interbedded with hard, dark gray to bluish -gray silty shale. Thin laminae, from paper -thin to 1/2" in Ithickness, of ,sectile, light gray -blue, bentonitic shale, •intersperse both types shale. Streaks light, blue -gray - ash; calcite fills the fractures. Numerous pelecypods found at 2521°. Ammonite fragments at 25221. Oil residue in fractures at 2522'. Dip Oo. DRILLED 2523 - 2540 Hard, gray -brown, platy, laminated shale with varying amounts of sectile, gray -blue, bentonitic shale. Calcite fragments and trace of coarse, gray -blue decomposed ash. I 2540 - 2560 Hard, dark gray to dark bluish -gray, dense, silty, calcareous shale with minor amounts of gray -blue Ibentonitic shale. Calcite fragments. 2560 - 2598 Hard, gray -brown, platy, laminated shale with varying amounts of interbedded sectile, gray -blue, bentonitic shale. Small amounts of calcite fragments and coarse to fine-grained, light gray -blue ash. CORE 2598 - 2609 Hard, dense to finely laminated gray -brown shale with scattered layers of sectile, gray -blue, bentonitic shale from paper -thin to 2" in thickness. Several thin streaks of coarse, greenish -gray sand. Calcite occurs in thin layers along the bedding planes and in fractures but is not abundant. Small amounts of carbonaceous material and pyrite. Pel ecypods found at intervals throughout the core. Live oil in the fractures from 2602-2609. Dip Oo. -19- DRILLED 2609 -2625 Hard, gray -brown, laminated to dense shale with varying amounts of sectile gray -blue, bentonitic shale and minor amounts of calcite fragments and decomposed ash. 2625 -Z656 Hard, dark brown to bluish -gray shale with dense, silty streaks; minor amounts of gray -brown shale and gray -blue, bentonitic shale. Calcite fragments and ash. CORE 2656 - 2668 Hard, gray -.brown, dense shale, laminated in part, with laminae of sectile, gray -blue bentonitic shale up to 8" in thickness; several 6" layers of impure limestone and limy shale; a few thin streaks of gray ash. Scattered fractures filled with calcite; minor amounts carbonaceous material. Small ammonite at 2659°; pelecypods scattered through -out core. Live oil and tarry oil in fracture planes from 2660-2668°. Dip Oo. NDRILLED 2668 - 2690 Hard, dense, dark brown silty shale with minor amounts light brown shale and gray -blue, bentonitic shale. Small amounts calcite fragments and ash. 2690 - 2695 Hard, gray -brown shale with minor amounts gray -blue, bentonitic shale; calcite fragments. 2695 - 2700 Hard, gray -brown shale and dark brown to bluish -gray calcareous shale with minor amounts of limy sand, bentonitic shale and gray ash. Calcite fragments. 2700 - 2725 Hard, dark brown to bluish gray, calcareous shale with minor amounts of laminated to dense gray -brown shale and bentonitic shale. Some ash, calcite fragments and pyrite. 2725 - 2730 Laminated, brittle light gray to brown ashy shale; laminated gray -brown shale; blue bentonitic shale. Minor amounts dark, calcareous shale and decomposed ash. CORE 2730 - 2740 Hard, gray -brown shale which is sometimes silty and calcareous and varies from dense to finely laminated. Gray -blue, bentonitic shale laminations from 1/8" to 2" in thickness. Several layers of hard, light -gray, - 20- G medium -grained, calcareous sand which is high in ash and from 1/4" to 8" in thickness. Minor faulting and fracturing with the fractures filled with calcite. Considerable carbonaceous material and plant remains. Several ammonites at 2735-361; pelecypods at 2738°. Considerable live and tarry oil in fracture planes. DRILLED 2740 -2760 Hard, gray -brown, dense to laminated, silty, calcareous shale in varying proportions with gray -blue, bentonitic shale. Several horizons of coarse-grained, hard, mottled gray - black, calcareous, ashy sand. Calcite fragments. 2760 -2795 Hard, dense to finely laminated, gray -brown shale which is silty and calcareous'in part; blue -gray, sectile, bentonitic shale. Minor amounts of calcite fragments, ash and ashy sand. DRILLED 2795 -Z820 Hard, light to dark brown, dense to laminated, locally silty and calcareous shale; varying amounts of blue to bluish -gray bentonitic shale as thin laminae in the brown shales. Minor amounts of decomposed ash; hard, arkosic, blue -gray sandstone; calcite fragments. CORE 2820 - 2824 3° rec. Massive, medium hard, dense, dark gray -brown shale with scattered thin laminae of sectile blue -gray bentonitic shale. The bottom foot of this core consists of a very hard, coarse, grained, mottled gray -blue, arkosic sandstone which is composed of milky to transparent quartz, feldspar and dark, possibly volcanic, material. The rock is split by numerous vertical fractures which are filled by calcite. A considerable amount of live and tarry oil is present along most of the fracture planes. Abundant ammonites 10 were found between 2820 - 2823. One small pelecypod. Dip Oo. 2824 - 2833 9` rec. 2824 - 2826 consists of the same very hard, co rse-grained, mottled blue -gray, arkosic sandstone as above. The last foot of the sandstone is pebbly and is mineralized by pyrite. Vertical fractures which contain tarry oil, calcite and show slickensiding. 2826 - 2833 - Hard, dark gray -brown, dense but locally laminated shale. A Tery few thin streaks of blue -gray -21- bentonitic shale and decomposed ash. Calcite lines and falls the fractures which also contain considerable live and tarry oil. Carbonaceous material was found throughout the shale. Ammonites at 2828 - 2833. Dip O°. DRILLED 2833 - 2855 Hard, light to dark brown or brownish gray, dense to finely laminated, locally silty or calcareous shale. Varying amounts of sectile, blue -gray bentonitic shale; minor amounts of decomposed ash and calcite fragments. 2855 -2923 Hard, dark gray -brown, dense, locally silty shale with varying amounts of light brown to brown, dense to finely laminated shale; blue -gray bentonitic shale, ash and calcite. Minor amounts of blue -gray, arkosic sandstone at 2855, 2890, 2895 and 2915. CORE 2923 - 2936 Rec. 13'. Hard, massive, poorly bedded but locally laminated and streaked, gray -brown, carbonaceous shale. It is locally calcareous and silty. Thin sandy streaks occur sparingly throughout the core. Thin, blue, bentonitic shale beds were found in the lower 7'. The fractures are inc'_ _reed about 60 degrees to the bedding planes and contain some tarry oil and calcite. An ammonite was found at 2935. Dip O°. DRILLED 2936 -2977 Hard, dark gray -brown, massive, locally silty and calcareous shale interbedded with -,rarying amounts of light brown, lami- nated to massive shale and blue bentonitic shale. Minor amounts of decomposed ash calcite fragments, and arkosic sandstone. CORE 2977 - 2987 10' rec. Hard, massive, mottled gray -brown, silty shale; medium hard, gray -brown, carbonaceous shale. Scattered laminae of sectile, blue -gray, bentonitic shale. One 4" streak of coarse-grained,, limy sandstone at 2979. The gray -brown shale is locally limy. Fractures which cut the bedding pianes at high angles contain considerable live and tarry oil. Part of the sandstone streak is oil stained. Calcite fills the fractures. Pelecypods at 2980 and 2982. Dip O°. -22, I I I T?R" T ,T _F: TI 2987 - 3025 Hard, dark gray -brown, massi-e male; some light brown shale; minor amounts of sectile, blue -gray, bentonitic shale, decomposed ash and calcite. 3025 - 3050 Hard, massive, dark gray -brown, silty shale; light brown carbonaceous shale; minor blue -gray, bentonitic shale; decomposed ash, arkosic sand and calcite. 3050 - 3083 Hard dark gra¢f-brown massive, calcareous shale; minor amounts of interbedded light brown shale, bentonitic shale, decomposed ash and calcite. CORE 3083 - 3099 1.6' rec. Very hard (but easily drilled) massive, mottled gray -brown, silty shale; gray -brown calcareous shale. Only a Very feu thin streaks of bentonitic shale and limy, brown sand. Plant remains and other carbonaceous material at 3088. Vertical fractures were filled with calcite and some lire and tarry oil. Gas inclusions along the fractures caused the oil to bubble out in places. Dip Oo. DRILLED 3099 -- 3130 Hard, massive, dark gray -brown, calcareous shale; light brown, locally silty shale; minor amounts sectile, blue, bentonitic shale, decomposed. ash, calcite fragments and arkosic: sandstone.. 3130 - 3138 Hard, massive, dark gray to gray -brown, calcareous shale; light brown, laminated shale; sectile, blue -gray bentonitic shale; minor amounts arkosic sand, decomposed ash and calcite fragments. Possibly encountered salt water near this depth. CORE 3138 - 1141 Y rec. Top foot: cons:,sts of a very hard, massive dark gray-brov.,n to brown. medium -to Tine -grained, silty, shale. Second footis hard massive, mottled grav-brown, medium - grained arkosic sandstone. Rema,nder of core is sect -le, blue -gray, bentonitic aha' e with a i" streak of coarse: brown, sand at t', -,e bottom. Core fractures and fracture planes contain tarry ora. Sta. ned sand rte _r fractures yields a pale 0 yellowe*.-;.er c.ti.t. Gaj.c_e ., frac. t,ires. Dip 0. 3141 - 3142 DRILLED CORE 3142 - 3144 21 rec. Hard, massive, mottled gray -brown, sandstone; hard, massive, fine-grained, gray -brown shale; bottom 10" of core very hard, massive gray to greenish -gray, fine-grained sandstone. Scattered layers of bentonite and ash throughout the shales. A few fractures filled with calcite. Dip Oo. 3144 - 3147 3° rec. Top 1811 very hand, massive dark gray -brown sandstone interbedded with medium -grained, gray to gray -brown, arkosic sandstone with laminae of brown shale and blue bentonite. Bottom 1811 hard, coarse-grained, mottled gray -brown to bluish -gray, ashy sandstone. One 411 streak of bentonite near bottom. Fractures contain calcite and tarry oil. Dip Oo. 3147 - 3149 21 rec. First 6" - sectile, pale blue -gray, bentonitic shale. Next 15" - thinly laminated, hard, gray -brown to dark gray, ashy sandstone. Distorted bedding planes in part of the core indicate some deformation prior to consolidation. Bottom 3" - hard, massive, coarse-grained, ashy, brown quartzite. Some pyrite to mineralization. Fine fractures contain small amounts of tarry oil and gas. Dip Oo. DRILLED 3149 - 3170 Hard, massive, brittle, gray to white sandy ash; hard, gray -brown shale; sectile, •blue -gray bentonitic shale; minor amounts brownish, medium -grained sandstone and calcite fragments. CORE 3170 - 3185 151 rec, r 3170 - 3172 Massive, medium hard, medium -to coarse- grained, bluish -gray with specks of white, silty ash which grades into an ashy limestone. The bottom 1011 is massive, fine-grained, light brownish limestone. 3172 - 3176 Massive, hard, coarse-grained, mottled white to gray -blue, ashy quartzite. Streaks of oil stain throughout the rock which gave weak ether cut. 3176 - 3185 A 611 bed of massive, light brown limestone grades into massive gray;, soft, limy ash. The rock contains -24- spots and specks of pure white ash. Below 3180' the rock is speckled with small light brown spots which appear to be oil stain. They fade quickly upon being exposed to the air. There are a few large fractures filled with calcite. Dip 0". 3185 - 3195 6' rec. Massive, medium hard, pale bluish -gray, coarse- grained silty ash, becomes rather chgrty in places. Whole I core speckled with small dots- of light brown oil stain. Core badly fractured with oil stain along the fracture planes. Dip 00. I3195 - 3212 16' rec. Massive, medium hard, pale bluish -gray, limy to silty ash; a few streaks of blue -gray chert; 4" bed of gray, I brown fine-grained limestone at 3198. Grain size varies along the core with the major part medium- to coarse-grained. Beds of fine-grained material from 1" to 6" thick occur at I intervals along the core. Much of the rock is speckled with light brown oil stain. A 2" zone at 3198 and one between 3208 and 3210 are coarser grained than the rest of the rock I and they are completely stained by oil. Give pale ether cut. Several large fractures lined with calcite and carry oil stain. Dip 00. 3212 3227 15' rec. 3212 - 3215 Massive, soft, coarse-grained, pale bluish -gray, silty to limy ash which is bentonitic in spots. Top 2" of core stained black. Core fractured and stained light brown along the fractures. Minor staining in rock itself. I 3215 - 3224 Massive, soft medium -grained, light to dark brown, limy ash and ashy limestone. The color is due in part to oil stain as the rock gives an ether cut. I There are a few thin laminae of blue -gray ash. Ash is quite silty in spots. Live light oil bubbles out of fractures in small amounts at places. 3224 - 3227 Massive, soft to hard medium -grained, tight, mottled pale bluish -gray to white ash. Ash is hard and cherty in spots. Fractures lined with calcite and contain tarry oil. Bottom inch stained dark brown. Dip Oo. 3227 -3236 9' rec. Top 6" very coarse-grained, massive, soft, limy ash stained dark brown. Remainder of core is massive, soft to hard, pale bluish -gray to white, coarse- to fine-grained ash. It contains local silty, cherty, and brownish, limestone Ilayers. It is locally speckled with light brown oil stain and there are several 6" beds that are completely stained. Bottom 6" of core is ashy, blue bentonite. Core fractured Iand oil stain can be seen diffused into the rock along the fractures. A small amount of light oil was seen bubbling from the fractures in places. Dip 00. I -25- 3236 - 3248 12' rec. Massive, poorly bedded, soft to medium hard, fine - to coarse-grained, mottled gray to pale sea -green, limy, silty, cherty ash. The rock has a sandstone appearance but is much too soft. Locally thin, dark green laminae; 6" bed of light buff limestone at 3139'. Core badly fractured with fractures filled with calcite. Gas, and both live and tarry oil in fractures. Light oil still bubbling from core after 14 hours. Rock locally speckled with oil stain. Slight sulfurous odor on fresh -breaks. Dip 20. 3248 - 3250 2' rec. Thinly laminated, soft to medium hard, fine-grained, gray to greenish gray ash; massive, medium hard, mottled pale greenish gray to white, medium -grained ash. Core badly fractured. Fractures are quite open and lined with calcite. Live oil bubbles from fractures and tarry residue fills cavities. Dip 0-30. 3250 - 3254 4' rec. Top 811: Massive, dark brown, very hard, fine- grained, quartzitic sandstone; badly fractured, with fractures filled with calcite. Considerable light oil in fractures. Next I 14": Massive, partially laminated, medium -grained, soft, pale sea -green ash. Ash is speckled at top with oil stain. Remainder core: Massive to finely laminated, soft to medium hard, fine -to medium -grained, gray -brown, ashy sandstone with a few laminae of sea -green ash. Possibly some carbonaceous material. Core fractured and fractures open and filled with calcite. Considerable live light oil, tarry oil and gas. Sandstone gives pale ether cut. Dip 0-30. Ran Johnston Formation Tester with packer set on shoulder at 3196'. Naive opened at 10:05 A. M. and closed at 10:50 A. M. Slight steady blow throughout test, but no gas to surface. Recovered 752' of fluid. Top 182' was gassy heavy mud; next 91' was watery, gassy, mud with colors of oil; bottom 479' was gassy, muddy, salt water with scum tarry black oil. Small amount ashy sand in tool. May 29, 1939. 3257 - 3280 Massive, hard, fine-grained., gray to gray -brown sandstone. Massive, dark gray, silty to calcareous shale. CORE 3284 - 3286 2' recovery. Massive, very hard, very dark brown to black, extremely fine-grained sandstone or siltstone. It is slig-fitly coarser grained in places and. contains thin grayish -green laminae. There are la,,-ers of slat,:.- shale and ordinary gray -brown s- ale. Dip 0-20. -26- DRILLED 3286 - 3290 Massive, very hard, fine to medium grained, dark brown, ashy sandstone. Massive, hard, dark brown to black, silty shale. Calcite fragments. 3290 - 3300 Massive, very hard, medium to coarse-grained, greenish -gray, quartzitic sandstone; contains some ash, pyrite, and calcite stringers. 3300 -3305 Massive, very hard, fine to medium -grained, mottled white to dark brown and black, locally calcareous or ashy sandstone. Streaks of massive, coarse-grained, greenish -gray sandstone. 3305 - 3315 Massive, very hard, coarse-grained, white with black specks, limy sandstone; massive, fine-grained, dark brown sandstone or siltstone. Hard, olive-green, ash. 3315 - 3330 ; Massive, hard, gray -brown, fine to medium grained quartzitic sandstone; massive, to finely laminated, hard silty to calcareous shale; minor bentonitic shale and calcite fragments. 3330 - 3340 Massive, medium hard, mottled gray -white, fine to medium - grained ashy sandstone; massive, buff limestone; gray -brown shale; calcite fragments. CORE 3342 - 3355 131 recovery. Massive, medium hard, mottled white to dark gray, medium to coarse-grained ashy sandstone or cherty ash. The white material is in angular pieces up to 1/4" across and appears to be a kaolin -like mineral similar to nacrite or dickite. The gray matrix is cherty in appearance. Some fractures lined with calcite and containing dead oil. Sour, fetid odor to some of the core. Dip Oo. CORE 3355 -3365 101 recovery. Massive, medium hard, mottled white to dark gray or brown, medium to coarse-grained (grain boundaries poorly defined or absent) ashy, cherty sandstone or cherty ash. A few fractures lined with calcite and containing dead oil. Fragments of shale found in this core. Dip Oo. DRILLED 3365 - 3390 Massive, medium hard, mottled white -dark gray, chesty, ashy sandstone or cherty ash; hard., gray -brown shale; calcite fragments. Minor amounts gray -buff limestone. Disseminated pyr4te near 3390. -27- 3395 -3399 Massive, very hard, dark brown to black, fine-grained, slaty shale to cnerty quartzite; minor gray to white, ashy sandstone; gray -brown shale; calcite fragments. CORE 3399 - 3401 21 recovery. Interbedded massive, very hard, mottled pale greenish -gray to gray -brown, fine-grained slate or graywacke - to quartzite and thin layers of pale bluish -gray bentonitic shale and ash. The slaty rock contains inclusions of olive- green to gray, cherty material. There is a 4" layer of very - hard, fine-grained; gray -green slate which contains brownish specks, possibly oil stain. There are a few tight fractures filled with calcite. Considerable disseminated pyrite through- out core. Dip 0-40. DRILLED 3401 - 3413 Massive, very hard, mottled pale green to gray -brown, slate and quartzite; hard, light brown, fine-grained slate; minor gray -brown shale and calcite fragments. 3413 - 3415 Massive to poorly bedded, medium hard, pepper and salt gray, calcareous sandstone. CORE 3415 - 3417 21 recovery. Massive to poorly bedded, medium -grained, medium hard, pepper and salt gray, calcareous sandstone. A few small layers of soft, bluish -gray, bentonitic shale or decomposed ash. Minor gray -brown shale. A 4" layer of massive, coarse-grained, blue -gray, arkosic sandstone. Several large, vertical open fractures which are partially filled with calcite and carry dead oil stain. Dip 0-40. CORE 3417 3420 3° recovery. Top 18": Massive, softy very fine-grained pale bluish to greenish gray, bentonitic shale. Numerous small vertical fractures filled with calc-te. Bottom 18": Massive, very hard, gray -brown to black, fine-grained slate or slaty shale. Vertical fractures filled with calcite and containing some dead oil. Dip 3-50. DRILLED 3420 - 3445 Massi-,e, hard, fine-grained, dark gray -brown to bluish -black, slaty, locally calcareous shale; minor amounts gray -brown shale; brown, fine-grained limestone; gray, decomposed ash; calcite fragments. -28- M 3445 - 3458 Massive, hard, fine-grained, dark gray -brown to bluish -black calcareous shale and impure limestone. Minor amounts soft, bluish -gray bentonitic shale; gray -brown shale and calcite fragments. CORE 3458 - 3462 4° recovery. Massive, hard, gray -weathering, dark gray -brown to bluish -black calcareous shale to impure limestone. Thin interbeds of soft, sectile, blue -gray, bentonitic shale and decomposed ash; also gray -brown shale. One 6" layer of coarse-grained, bluish= -gray to brownish gray calcareous sandstone. Core is severly fractured, with large, vertical, open, calcite -lined fractures. A little dead and tarry oil along the fracture planes. Dip 50, DRILLED 3462 - 3495 Massive, hard, fine-grained, dark gray -brown to bluish -black calcareous shale. Minor amounts light brown shale; bentonitic shale; massive, bluish -gray to brown limy sandstone; gray -brown shale; calcite fragments. aDRILLED 3495 - 3517 Massive, hard, fine-grained, dark gray -brown to bluish -black calcareous shale. Minor amounts pale greenish to bluish -gray bentonitic shale; light brown shale; decomposed ash; and calcite fragments. CORE 3517 - 3521 3° recovery. Massive, hard, fine grained, dark gray -brown to I _ bluish -black calcareous shale and impure limestone. Occasional poorly defined, thin, bentonitic layers. Core is very badly fractured. Fractures are vertical, calcite lined and contain tarry oil. Dip 00. DRILLED 3521- 3540 Massive, hard, fine to medium -grained, dark gray -brown to bluish -black calcareous shale and impure limestone. Minor amounts pale greenish to bluish -gray bentonitic shale; decomposed ash; disseminated pyrite; calcite fragments. Tarry oil along fractures. 3540 - 3575 Massive, fractured, fine-grained, hard, dark gray -brown to bluish -gray locally calcareous shale; minor amounts of light brown shale, bentonitic shale, medium -grained blue -gray sand- stone and calcite fragments. -29- CORE 3575 - 3578 3' recovery. Massive, hard, fine-grained, dark gray -brown to bluish -gray very calcareous shale or impure limestone ' which grades into streaks of similar appearing non -calcareous shale. A 6" streak of intensely fractured, bentonitic appearing shale at 3577. This streak may be a small gouge zone. The core is fractured to state of brecciation in places. Large open fractures up to 1/2" are lined with calcite showing crustiform banding. Tarry oil along fracture planes. Dip Oo. DRILLED 3578 - 3643 Massive, hard, fine-grained, dark gray -brown to dark bluish - gray, locally calcareous shale. The carbonate content is highest in the dark bluish -gray shales but some of the brown shales are limy. Minor amounts of pale bluish -gray to .pale greenish -gray bentonitic shale; light brown shale, ash and sandstone. These small amounts may be dropping in from higher in the hole. Calcite fragments. 3643 - 3653 7' recovery. Massive, hard, fine-grained, dark gray -brown to bluish -gray shale. Shale very calcareous in places and .-J,at in others. A few thin streaks of bentonitic and ashy shale. A few traces of carbonaceous material. Core is very badly fractured and fractures are from hairline to 1/2" in thickness. All are calcite lined and some have open vugs. Tarry oil along some of the fracture planes. Dip Oo. DRILLED U53 - 3690 Massive, hard, fine-grained, dark gray -brown to dark bluish - gray locally calcareous shale. Minor amounts bentonitic shale and calcite fragments. 3690 - 3721 Massive, hard, fine-grained, dark gray -brown to bluish -gray calcareous shale. Minor amounts dark bluish -gray bentonitic shale. Calcite fragments. CORE 3721 - 3731 10° recovery. Massive, hard, fine-grained, dark gray -brown slightly calcareous to bluish -gray calcareous shale. Thin streaks of dark, bluish -gray, bentonitic shale and medium - grained speckled gray -black limy sandstone. Sandstone contains some pyrite. Small inclusions of dark blue, crystalline limestone in the shales. Small pecten similar to those in upper part of lower Kialagvik sandstone found between 3724 - 3730. -30- Traces of carbonaceous material. Cores badly fractured with fractures calcite lined. Most of the fractures are tight but some are open as much as an eighth of an inch. Tarry oil along fracture planes. Dip O°. DRILLED 3731- 3765 Massive, medium -hard, fine-grained, dark gray -brown to dark I bluish -gray, locally calcareous shale. Minor amounts bentonitic shale, limy gray sandstone, ash and calcite fragments. Forma- tion badly fractured with severe loss of mud, approximately 20 barrels per hour. 8-5/8" casing landed at 3760°, and cemented. Plug drilled out. TEST FOR SHUTOFF Johnston tester run July 19 with packer set in 8-5/8" casing at 37501, with perforated tail pipe to 3763°. Valve opened for 45 minutes. Slight steady blow for 6 minutes but no blow for balance of test. Recovered 241 of drilling mud. No free water. DRILLED ' 3765 -3783 Massive, medium hard, fine-grained, dark gray -brown, calcareous shale. Calcite fragments. Large amounts .r7asing 1 scale and cement. CORE 3783 - 3794 51 recovery. Massive, medium hard, fine to medium -grained, dark gray -brown, calcareous shale. A few 1" streaks of medium -grained, bluish -gray decomposed ash. Ash also in small lenses in the shale. Small amount pyrite in shale. Core is extremely fractured throughout and in places is brecciated. The fractures are both vertical and horizontal, tight and open. Calcite veins up to 1" in thickness fill the fractures and occasionally contain vugs. At 3787 approximately the rock is brecciated and one piece was found to be recemented by cement used in landing the casing. A little tarry oil in fracture planes. Dip 0-50 . DRILLED 3794 - 3830 Massive, medium hard„ fine-grained, dark gray -brown to brownish -black, calcareous shale. Minor amounts ash. Calcite veinlets and fragments. 3830 - 3840 Massive, medium hard, fine-grained, dark gray -brown, to dark gray impure limestone; massive, dark gray-brown9 calcareous shale. Minor amounts calcite veinlets and fragments. -31- ■ UDRILLED 3840 - 3888 Interbedded massive, medium hard, fine-grained, dark gray - brown to black, impure limestone and calcareous shale. Minor amounts of pale bluish -gray bentonitic shale; decomposed ash; calcite fragments. CORE 3888- 3892 4' recovery. Massive, medium hard, fine-grained, dark gray - brown, calcareous shale. A few thin 1/2" streaks of fine- grained dark brown limestone.. Several thin laminae up to 1/2" thick of decomposed ash and pale bluish -gray bentonitic shale. Small amount of carbonaceous material. A little tarry oil along fracture planes. Core not as badly fractured as the last one, but fractures still lined with calcite. Dip 3-50 . DRILLED 3892 3934 Massive, medium hard, fine-grained, dark gray -brown, cal- careous shale. Minor amounts gray -brown limestone, bentonitic shale, ash and calcite fragments. CORE 3934 3936 2' recovery. Interbedded - massive, fine-grained, hard, dark gray -brown to brownish black, silty to calcareous shale; dark gray -brown shale. A few thin streaks of pale bluish to greenish gray bentonitic shale and medium -grained ash. Silty shale contains a few scattered grains of glass. All formations somewhat limy and some are very hard. Core slightly fractured with hair -line calcite veins. A little tarry oil in fractures. Dip 0-30 . DRILLED 3936 -3980 Interbedded -massive, hard, fine-grained, dark gray -brown to brownish -black calcareous to silty shale and some impure limestone. Minor amounts of pale bluish bentonitic shale and ash; calcite fragments; a little black, vitreous carbonaceous material or gilsonite. 3980 - 4006 Interbedded -massive, hard, fine-grained, dark gray -brown to brownish black, calcareous to silty shale and impure lime- stone. Minor amounts of pale bluish bentonitic shale and ash; calcite fragments. A little carbonaceous material or gilsonite. CORE % 4006 - 4010 4' recovery. Massive, hard, Very fine -to fine-grained, dark -32- IN P gray -brown to brownish -black calcareous shale. Thin streaks I of dark bluish -gray bentonitic shale. Bottom foot - massive medium -grained, gray -brown limestone. Core slightly fractured with hair -line calcite veins both vertical and I horizontal. Tarry oil in fractures. A few very small, poorly preserved bivalves. Dip 3-50. DRILLED 4010 - 4060 Interbedded - massive, hard, fine-grained, dark gray -brown to brownish -black calcareous shale and impure limestone in varying amounts. Minor amounts of bentonitic shale, ash and calcite fragments. I4060 - 4100 Interbedded - massive, medium hard, fine-grained, dark gray -brown to brownish -black calcareous shale and impure I limestone in varying amounts. Minor amounts of bluish -gray bentonitic shale, ash and calcite fragments. I- 4100 - 4130 Interbedded - massive, medium hard, fine-grained, gray - weathering, dark gray -brown to brownish -black calcareous shale and impure limestone. Minor amounts of pale bluish I- to greenish -gray, sectile bentonitic shale and mottled gray -green, medium -grained ash. A little brown -stained calcite in hairline veinlets. DRILLED I- 4130 - 4163 Interbedded - massive, medium hard, fine-grained, dark gray -brown to brownish -black calcareous shale and impure limestone in variable proportions. Thin streaks of pale Ibluish to greenish gray bentonitic shale and medium -grained bluish -gray ash. Hairline veinlets of oil stained calcite. CORE 4163 - 4168 51 recovery. Top foot - massive, medium -hard, gray -brown, I- medium -grained impure limestone. Remainder of core - massive, soft to hard, very fine to medium -grained, non - calcareous to calcareous, dark gray -brown to brownish -black shale. Very fine-grained shale is very hard and strongly calcareous; will scratch glass; contains some pyrite and carbonaceous material.. Thin streaks from 1/8" - 1/2" in thickness of pale bluish. -gray, sectile bentonitic shale and medium -grained, bluish -gray ash. Core has a few small hairline fractures lined with calcite which contain a little tarry oil. Dip 50. -33- DRILLED 4168 - 4182 Interbedded - massive, very fine to medium -grained, soft to medium hard, dark gray -brown to brownish -black, slightly to strongly calcareous shale and impure limestone. Minor amounts of bluish -gray bentonite and calcite fragments. CORE 4182 - 4188 6° recovery. Top 6" - Massive, medium -grained, medium hard, gray -brown limestone. Next 10" - Massive, soft, flaky„ gray -brown, slightly calcareous shale. Next 24" - Massive, hard, brittle, very fine-grained, dark gray -brown to brownish.. -black strongly calcareous shale.. Remainder of core - Massive to finely laminated, medium hard, fine- grained, dark gray -brown slightly calcareous shale. Paper -thin laminae of bentonitic shale at intervals ' throughout the core. Core slightly fractured with fractures lined with calcite and showing a little tarry oil. Dip 0-50. 4188 - 4195 71 recovery. Interbedded - Massive to laminated, soft and flaky to hard and brittle, very fine to medium -grained, gray -brown to dark brownish -black, slightly to strongly calcareous shale. Massive, light gray to dark brownish, fine to medium -grained limestone. Thin laminae of frc:r-n 1/8 to 211 thick of pale to dark bluish -gray bentonitic shale and ash. Core quite brittle in spots with quite a few vertical and horizontal fractures lined with calcite. A little tarry oil along fracture planes. Dip 0-50. 4195 - 4200 59 recovery. Interbedded - Massive, medium -grained, soft and flaky to medium hard, dark gray -brown, slightly to strongly calcareous shale. One V bed dark gray -brown, medium -grained limestone. One 4" bed pale bluish bentonitic shale and medium -grained ash. Core fractured with both vertical and horizontal calcite -lined fractures. Tarry oil along fracture planes. Minor amount of pyrite. Dip 0-50. 4200 - 4207 79 recovery. Interbedded - Massive to finely laminated, soft and flaky to medium hard, dark gray -brown calcareous shale and fine to coarse --grained light to dark brown, brittle limestone. Several 419 - 10" streaks of pale bluish -gray, soft, sectile bentonitic shale and medium -grained gray -blue ash. Scattered thin lamin ae of bentonitic shale. Core slightly fractured with vugs and bot? vertical and horizontal calcite lined eins. Some: tarry o--' in fractures. Dip 0-30 . 4207 - 421.3 61 reco,rerv. Interbedded - Massi--re, medium hard, fine- grained, dark gray -brown to brownish -black calcareous -34- shale and light to dark gray -brown fine-grained limestone. Several 2" streaks of pale bluish -gray ash and bentonitic shale. Some pyrite. Core fractured by both vertical and horizontal hairline, calcite -lined, fractures. A little tarry oil along fracture planes. A few very small pelecypods at 4209. Dip 0-30 . DRILLED 4213 - 4215 Massive, black, calcareous shale. CORE 4215 - 4224 91 recovery. Interbedded - Massive, medium hard to soft and flaky, fine-grained, dark gray -brown calcareous shale. One 14" and one 4" bed of brittle fine-grained, dark gray - brown, limestone. Several 1" 2" streaks of pale bluish bentonitic shale.. Frequent thin laminae of bentonitic shale and ash. Minor amounts of pyrite.. Core fractured by both vertical and horizontal, hairline to 1/811, calcite -lined fractures which contain some tarry oil.. A few small pelecypods at 4220. Dip 0-30. 4224 - 4226 21 recovery. Interbedded - Massive, very fine to fine-grained, medium hard and flaky, dark gray -brown to brownish -black calcareous shale and fine-grained, dark gray -brown limestone. A few thin laminae of medium -grained, mottled gray -green ash. Horizontal and vertical hairline calcite -lined fractures which contain a little tarry oil. Abundant small pelecypods of several genera - pecten etc. at 4224 - 4226. Dip 0-30. 4226 - 4229 3° recovery. Interbedded - Massive, indurated, very fine to fine-grained, medium hard and flaky to hard, dark gray - brown to brownish -black, calcareous shale and massive, dark gray -brown, fine-grained limestone. A few thin laminae of mottled gray -green ash. Horizontal and vertical, calcite -lined fractures with a little tarry oil. Abundant pelecypods at 4226 - 4227. Dip 0-30. DRILLED 4229 - 4255 Interbedded - massive, hard, indurated, very fine to fine- grained, dark gray -brown to brownish black calcareous shale; and massive, fine-grained, conchoidal fracture, dark gray - brown;, impure limestone. Minor amounts bentonite and ash. Scattered calcite fragments and hairline calcite veinlets. 4255 - 4280 Interbedded - massive, hard and indurated to medium hard and flaky, very fine to fine-grained, dark gray -brown to brownish black, non -calcareous to calcareous shale and. -35- massive, hard, dark gray -brown impure limestone. Thin streaks of pale greenish to bluish bentonitic shale and medium -grained speckled gray -green ash. Minor amounts pyrite. Slightly more calcite fragments. C ORO 4280 - 4287 3° recovery. Interbedded - Massive, medium hard, laminated and flaky, dark gray -brown shale; massive, fine-grained, indurated hard, brownish -black calcareous shale; massive dark -gray -brown impure limestone. Thin streaks of pale greenish gray bentonitic shale from 1/8" to 3" thick and ash. Minor amounts of primary pyrite. A few vertical hairline calcite -lined fractures. Dip 0-30. DRILLED 4287 - 4312 Interbedded - Massive, hard, indurated, fine-grained, dark gray -brown, calcareous shale which contains scattered grains of ash and transparent silica; massive, fine-grained, dark gray -brown impure limestone. Minor calcite fragments and veinlets; ash and bentonitic shale. Beyond 4295 beds of massive, to laminated and flaky, gray -brown shale, light buff limestone, and medium -grained, speckled gray -green ash are interbedded with the darker shales. CORE 4312 - 4318 41 recovery. Interbedded - Massive, hard, medium -grained, brittle,, dark gray -brown limestone; small streak coarsely crystalline, dark gray -brown limestone; massive, indurated, very fine to fine-grained, brownish -black, calcareous shale; small streaks fine-grained, flaky, gray -brown shale; one 4" streak of coarse-grained, hard, gray, calcareous ash; scattered thin streaks of pale greenish to bluish bentonitic shale; a little primary pyrite. Core slightly fractured by long, vertical, calcite -lined fractures which contain oil residue. Dip 0-30. 4318 - 4322 2° recovery. Interbedded - Massive, hard, indurated, very fine to fine-grained, dark gray -brown to brownish -black calcareous shale; massive, soft, sectile, dark bluish bentonitic shale; several 2'' streaks medium to coarse grained, speckled, greenish -gray ash. Small hairline, calcite -lined fractures. Some tarry oil. Dip 0-30. CORE 4322 - 4325 Interbedded - massive, very hard and indurated, extremely fine to fine-grained, conchoidal fracture, dark gray -brown to -36- brownish -black calcareous shale; small streaks flaky, gray - brown shale; a few streaks pale bluish bentonitic shale. Core contains a few almost vertical hairline, calcite -lined, fractures. A few scattered grains of transparent silica in fine- grained shales. Dip 0-50. DRILLED 4325 - 4350 Interbedded - Massive, very hard and indurated, extremely fine to fine-grained, brownish -black calcareous shale; fine-grained, dark gray -brown impure limestone; medium hard, fine-grained, flaky, gray -brown shale; pale bluish to greenish -gray bentonitic shale and medium -grained light gray ash. Brown -stained calcite and calcite veinlets. 4350 - 4360 Thinly interbedded - Massive, medium hard, fine to coarse- grained, gray -brown, calcareous and ash, shale or shaly ash, which contains disseminated pyrite; fine-grained, brownish, black calcareous shale; flaky to laminated, gray -brown shale; fine-grained, gray -brown limestone and very fine-grained, dark gray -brown limestone; pale bluish bentonitic shale and medium grained gray ash; a few large calcite fragments. 4360 - 4380 Thinly interbedded - Massive, medium hard, fine-grained, flaky gray -brown, non -calcareous shale; very fine to fir.e- grained, light to dark gray -brown, brittle limestone; dark brownish -black, calcareous shale; pale bluish -gray bentonitic shale and medium -grained, gray ash; calcite fragments and veinlets. 4380 - 4400 Thinly interbedded - Massi-,re, medium hard, fine-grained, brownish -black calcareous shale; light to dark gray -brown limestone; pale greenish to bluish bentonitic shale; flaky, gray -brown shale; minor medium -grained gray ash; brown -stained calcite fragments and veinlets. 4400 - 4420 Interbedded - Massive, fine-grained, dark gray -brown, slightly calcareous shale; massive, fine-grained, medium hard, brownish -black, calcareous shale; fine-grained, dark gray -brown limestone; pale bluish -gray, soft, bentonitic shale; abundant calcite fragments and minor mottled, gray -green, medium -grained, ash. 4420 - 4430 Interbedded - Massive, medium grained, light gray -green limestone; laminated, fine-grained, gray -brown shale; massive, gray -brown to brownish -black calcareous shale; pale bluish -gray, soft, bentonitic shale; medium grained gray ash and considerable calcite fragments. -37- ■ 4430 - 4470 Interbedded - Massive, fine-gra:Ined, medium hard, brownish - black, calcareous shale; light gray -blue to dark gray -brown, fine-grained impure limestone; laminated and flaky, medium hard, fine-grained gray -brown shale; bright green to pale bluish -gray bentonitic shale; gray -brown, very fine-grained cherty shale; minor - fine-grained greenish -gray sandstone which contains small amounts of disseminated pyrite; fire - grained gray ash; calcite fragments and veinlets. 4470 - 4500 Interbedded - Massive, medium hard, fine-grained, brownish - black calcareous shale which also contains at a few scattered depths abundant grains of ash; laminated and flaky, medium - hard, fine-grained, gray -brown shale; light to dark gray -brown, fine-grained impure limestone; soft, sectile, pale bluish to greenish -gray bentonitic shale; minor - fine to coarse-grained pale bluish -gray ash; calcite fragments and hairline veinlets (often brown- stained). 4500 - 4530 Interbedded - Massive, to laminated, fine-grained, medium hard, gray -brown shale; massive, brownish -black, fine-grained, medium hard, calcareous shale; light to dark gray -brown, fine- grained, impure limestone; soft, sectile, pale bluish to greenish - gray bentonitic shale; minor -fine to coarse-grained, gray ash; calcite fragments and hairline veinlets. 4530 - 4545 Interbedded - Massive, medium hard, fine-grained, brownish - black, calcareous shale; fine-grained, light to dark gray -brown, impure limestone; pale bluish -gray, soft, sectile bentonitic, shale; minor - laminated, gray -brown shale; fine to coarse- grained gray ash; calcite fragments and veinlets. 4545 - 4548 Interbedded - Massive, fine-grained, medium hard, bluish -gray, impure limestone or calcareous shale; fine-grained, gray -brown, limestone and brownish -black calcareous shale; minor - laminated gray -brown shale; pale bluish bentonitic shale; fine to coarse- grained gray ash and calcite fragments. CORE 4548 - 4557 3' recovery. Interbedded - Massive, to laminated, soft, sectile, light to dark bluish -gray bentonitic shale. Several thin streaks of fine-grained, light gray -buff impure limestone; laminated coarse-grained, mottled, gray -blue ash; coarse-grained, pebbly, calcareous sandstone; massive, -very fine-grained, brownish -black calcareous shale. Ditch samples of same depths show large amounts of fine-grained, gray -brown, lami- nated shale; dark gray -brown limestone. Core only slightly fractured by hairline calcite -lined fractures. Dip 50 . 39VE DRILLED 4557 - 4570 Interbedded - massive to laminated, light to dark bluish -gray bentonitic shale; massive, very fine-grained, brownish -black, medium hard, calcareous shale; fine-grained, laminated, gray -brown shale; fine to coarse-grained, dark bluish to white ash; medium grained gray sandstone; calcite fragments. 4570 - 4590 Interbedded - massi.re, fine-grained, medium hard, brownish - black, calcareous shale which locally carries grains of ash; fine-grained, light greenish -gray to dark gray -brown impure limestone. Minor - pale greenish to bluish -gray, soft, sectile, bentonitic .shale; fine to coarse-grained mottled gray to brown ash; calcite fragments and veinlets. DRILLED ' 4590 - 4620 Interbedded - massive, fine-grained, medium hard, brownish - black, calcareous shale (with local ash content); fine-grained, dark gray -brown, impure limestone; soft, sectile, pale greenish to bluish -gray bentonitic shale (locally most abundant rock); laminated, fine-grained, gray -brown shale; minor - ' fine to coarse-grained gray -blue ash; brown stained calcite. 4620 - 4635 Interbedded - massive, to finely laminated, soft, sectile, pale greenish to bluish -gray bentonitic shale; massive, very fine- grained, brownish -black, cherty shale; laminated, gray -brown shale; coarse-grained, mottled greenish -gray limestone; fine to coarse-grained gray to blue ash; calcite fragments and veinlets. I CORE 4635 -4645 3" recovery. Interbedded - massive to thinly laminated, light greenish gray -brown, fine-grained, medium hard, ash, non - calcareous shale; massive, fine-grained, medium hard, gray - brown, non -calcareous shale; soft, sectile, light bluish -gray bentonitic shale; massive, fine-grained, medium hard, brownish -black cherty shale; a few thin lam in ae of medium - grained, light gray -brown impure limestone. Core slightly fractured with calcite veinlets from hairline to 1/8". Oil residue along fractures. Dip 5-100. IDRILLED I 4645 - 4665 Interbedded - massive, to thinly laminated; soft, sectile; pale greenish to bluish., bentonitic shale; massive, medium -grained, light brownish -gray, impure 'Limestone; massive; fine-grained, brownish -black cherry shale; laminated gray -brown shale; brown -stained calcite fragments and veinlets. -39- 4665 - 4705 Interbedded - massive, fine-grained, medium hard, brownish - black, non -calcareous shale (30% - 90%); massive, soft, locally laminated, pale greenish -gray to bluish -gray bentonitic shale (57o - 7016); massive, fine-grained, light gray -buff, impure ' limestone; laminated, fine-grained, gray -brown shale; coarse- grained, gray -blue, ash (locally oil -stained); calcite fragments and veinlets. 4705 - 4710 Interbedded - massive, fine-grained, dark gray ash 50%; light gray -buff, limestone 2017o; light to dark bluish -gray bentonitic shale; massive, fine-grained, brownish -black non -calcareous, shale; calcite fragments. 4710 - 4730 Interbedded - massive to laminated and flaky, light gray -brown shale 2 jo - 7010; massive, very fine-grained, dark gray -brown cherty shale which locally contains abundant minute grains of white ash 510 - 65%; light to dark bluish -gray, soft, bentonitic shale; fine-grained, light gray to dark gray -brown, impure limestone; fine to coarse-grained, gray ash; calcite fragments and.veinlets. Calcite locally oil -stained. 4730 - 4788 Interbedded - massive, fine-grained, dark gray -brown, locally calcareous shale 3510; massive to laminated, fine-grained, gray -brown shale 35%; light to dark bluish -gray, soft, locally laminated, bentonitic shale; light gray, fine-grained, ir-pure limestone; fine-grained, light gray ash; calcite fragments and veinlets. CORE 4788 - 4790 V recovery. Massive, fine-grained, pale bluish -gray, medium Ihard, non -calcareous, ash, bentonitic shale or bentonitic siltstone. Core fractured with brown and white calcite veinlets ' up to 1/8" thick. Oil residue along fracture planes. Dip not available. DRILLED 4790 - 4820 Interbedded - massive to laminated, fine-grained, soft to medium hard, light gray to pale bluish -gray, bentonitic shale and bentonitic siltstone 5016 - 75%; massive, fine-grained, dark gray -brown, non -calcareous shale; fine-grained; gray -brown, laminated shale; light gray, fine-grained, impure limestone; fine-grained, light to dark gray ash; calcite fragments and veinlets. 4820 - 4838 Interbedded - massive to laminated, soft to medium hard, light gray to greenish -bluish -gray bentonitic shale 40%; massive, fine-grained, medium hard, light to dark gray brown, locally calcareous shale 40%; light gray, fine-grained, ash and impure -40- limestone; disseminated pyrite; calcite fragments and veinlets. Mud weight dropped at 48261 to 4830' from 8 5 lbs, to 5 0 lbs. Gas bubbles with iridescent film in mud. CORE 4838 - 4843 5' recovery. Top 2' - massive to poorly laminated, very fine to coarse-grained, 'soft, gray -brown to greenish-brown to pepper and salt gray, micaceous, ash, calcareous sandstone and sandy ash. Grain size decreases from bottom of bed to top. Contains specks carbonaceous material. Middle 18" - Interbedded - massive to poorly laminated, soft, dark, bluish -gray bentonite 60%; massive to finely laminated, hard, Ivery fine to fine-grained, dark gray -brown shale; 1" streak coarse-grained, soft, pepper and salt gray, calcareous micaceous, sandstone; 2" streak gray -brown shale with Iangular fragments of calcareous material. Bottom 18" - Massive, soft, pale greenish -gray, fine-grained, bentonite with streaks of coarser bentonite. Core slightly fractured with calcite lined veinlets from hairline to 1/8". Dip Oo. DRILLED 4843 - 4855 Interbedded - massive to laminated, fine-grained, medium hard, light to dark gray -brown shale 4010 - 651o; massive, pai^ bluish to greenish -gray bentonite 15-35%; light gray, fine-grained, locally calcareous ash; calcite fragments and veinlets. 4855 - 4895 Massive, fine-grained, medium hard, brownish -black, calcareous shale 50-75%; streaks of pale bluish bentonite; light gray, fine-grained ash and limestone; calcite fragments. IMinor amounts dark gray -brown impure limestone, greenish bentonite and gray -blue ash below 4880. ' 4895 - 4905 Massive, soft, light to dark gray to greenish -bluish -gray, bentonite 801a; light gray, fine-grained ash; laminated, gray -brown shale; brownish -black, calcareous shale; calcite fragments and veinlets. 4905 - 4952 interbedded - massive, fine-grained, brownish -black, cherty, calcareous shale 20-50%; laminated, fine-grained, gray -brown, shale 5-20%; light gray to dark bluish -gray, bentonite 10-30%; fine to coarse, gray ash; dark gray to dark gray brown limestone; disseminated pyrite; calcite veinlets and fragments. CORE 4952 - 4963 4" recovery. Massive, very fine to fine-grained, soft, dark - gray to dark greenish -gray poorly laminated, locally calcareous bentonitic shale, and decomposed ash. No fractures. Dip Oo? -41- Ditch samples from 4952 - 4963 show in addition - brownish - black, calcarous shale; laminated gray -brown shale; coarse- grained gray ash; calcite fragments. DRILLED 4963 - 4975 Interbedded - massive to laminated, medium hard, very fine to fine-grained, brownish -black locally calcareous shale; dark gray to pale greenish -gray ash; light gray to bluish -gray bentonite; light to dark gray -brown limestone; pyrite; gilsonite or carbon; calcite fragments and veinlets. DRILLED 4975 - 5000 Interbedded - massive, fine-grained, dark gray -brown to brownish -black, calcareous shale 2019-501q; fine-grained, dark gray -brown, impure limestone 0%-40%; massive, fine to coarse-grained, light to dark gray, locally limy ash 51c -351o; massive, soft, fine-grained, light to dark gray to ' light to dark bluish -gray bentonite 516-20%; massive, fine- grained, sea -green ash; light to dark gray, fine to coarse- grained limestone; pyrite; calcite veinlets and fragments. 5000 - 5030 Interbedded - massive, fine-grained, dark gray -brown to brownish -black, calcareous shale 30% - 7076; fine to m-:dium- grained, light to dark gray, locally calcareous ash 15%i-35%; light to dark gray to bluish -gray, soft, bentonitic shale; laminated, gray -brown shale; fine-grained medium hard, 1 sea -green ash; light to dark gray -brown, fine-grained, impure limestone; pyrite_ ; brown to white calcite veinlets and fragments. 5030 - 5060 Interbedded - massive, fine-grained to cherty, medium hard, calcareous shale 3001a - 80%; light to dark gray, fine to medium -grained ash 510 - 35%; massive, soft, light to dark bluish -gray, bentonite 5% - 3516; laminated, gray -brown, fine-grained shale; massive, fine-grained, sea -green ash; massive, fine-grained, dark gray -brown impure limestone; brown to white calcite fragments and veinlets. DRILLED 5060 - 5097 Interbedded - massive, fine-grained to cherty, medium hard, brownish -black calcareous shale 20016 - 651o; light to dark gray, fine to medium grained, soft, ash, 2001a - 50%; light to dark bluish -gray bentonitic shale; massive to laminated, fine-grained gray -brown shale; massive, fine-grained, sea -green ash; dark gray -brown, fine-grained, sea -green ash; dark gray -brown, fine-grained, massive, impure limestone; disseminated pyrite; -42- 5180 - 5200 Interbedded - massive, medium hard, fine-grained, brownish, black, calcareous shale 3010 - 6001a; massive, fine to medium - grained, light to dark gray, greenish -gray, locally limy, ash 2016 - 40016; massive to laminated, fine-grained, soft, light to dark bluish -gray, bentonite; gray -brown shale; white to gray - brown limestone; calcite veinlets and fragments. 5200 - 5214 Interbedded - massive, fine-grained, pale greenish -gray, limestone 20% - 75%; massive, fine-grained, brown: sh-black, calcareous shale 10% - 30%; light to dark gray to greenish -gray, fine to medium -grained, locally limy ash 10% - 30%; light to dark bluish -gray, bentonite; laminated gray -brown shale; primary pyrite; calcite veinlets and fragments. CORE 5214 - 5224 41 recovery. Massive, fine to medium -grained, soft, pale greenish -gray bentonitic ash and bentonite. Several thin streaks of massive, fine-grained, brownish -black calcareous -43- gilsonite or carbon fragments; brown to white calcite veinlets and fragments. CORE 5097 - 5111 14' recovery. Massive to finely laminated, softy very fine to medium -grained, pale bluish to bluish -gray, ash, bentonitic ash and bentonite. Local thin laminae of gray to white, medium - grained, limestone. Ash locally contains black specks. A few hairline fractures lined with calcite stained black by oil residue. Dips 20 - 450; this steep dip may not be a true dip but rather an initial dip. DRILLED 5111 - 5160 Massive, locally laminated, soft, fine to medium -grained, gray, pepper and salt gray, greenish -gray, locally limy ash 20%-75%; massive, cherty, brownish -black, locally calcareous shale 1016-40016; massive, fine-grained, soft, pale to dark bluish -gray, bentonite 516-2016; massive to laminated, fine-grained, gray - brown shale; massive, medium -grained, gray to white, limestone; brown to white calcite veinlets and fragments. 5160 - 5180 Massive, very fine to fine-grained, soft, pale bluish -gray, light to dark gray, greenish -gray, bentonitic ash 6001a - 85%; .nassive, fine-grained, medium hard, brownish -black, calcareous shale 1510 - 20%; massive, medium -grained, pepper and salt gray, ash; light to dark bluish -gray, massive, soft, fine-grained, bentonite; light to dark gray limestone; laminated, fine-grained, gray - brown shale; pyrite; brown to white calcite veinlets and fragments. 5180 - 5200 Interbedded - massive, medium hard, fine-grained, brownish, black, calcareous shale 3010 - 6001a; massive, fine to medium - grained, light to dark gray, greenish -gray, locally limy, ash 2016 - 40016; massive to laminated, fine-grained, soft, light to dark bluish -gray, bentonite; gray -brown shale; white to gray - brown limestone; calcite veinlets and fragments. 5200 - 5214 Interbedded - massive, fine-grained, pale greenish -gray, limestone 20% - 75%; massive, fine-grained, brown: sh-black, calcareous shale 10% - 30%; light to dark gray to greenish -gray, fine to medium -grained, locally limy ash 10% - 30%; light to dark bluish -gray, bentonite; laminated gray -brown shale; primary pyrite; calcite veinlets and fragments. CORE 5214 - 5224 41 recovery. Massive, fine to medium -grained, soft, pale greenish -gray bentonitic ash and bentonite. Several thin streaks of massive, fine-grained, brownish -black calcareous -43- shale and small inclusions of gray limestone. Several fractures up to 1/8" thick lined with brown and white calcite and dead oil residue. Dips 20-400 - are not good but seem to confirm attitudes in last core. Ditch samples of same part of hole show considerably more brownish - black calcareous shale. CORE 5224 - 5227 18" recovery. Very finely laminated, medium to fine- grained, medium hard to hard, laminated dark gray pale greenish -gray, ashy sandstone, sandy bentonitic ash; thin laminae of very fine-grained, hard, greenish -gray, silicious ash; thin streaks of coarse-grained, gray -green limestone. A few thin fractures lined with calcite and brownish -black oil residue. Dip 300. DRILLED 5227 - 5260 Interbedded or streaked - massive, fine-grained, medium hard, pale bluish -gray, bentonitic ash and bentonite 1001c - 98%; light to dark gray to greenish gray to sea -green, massive, fine to medium -grained locally limy ash 10%; massive, medium -grained, gray to greenish -gray, ashy, limy sandstone 00/a - 40%; massive, cherty, brownish -black, locally calcareous shale; lami:sted, gray -brown shale; massive, fine to medium -grained, greenish - gray to gray -brown impure limestone; white to brown calcite veinlets and fragments. 5260 - 5280 Interbedded or streaked - massive, cherty, hard, brownish - black, locally calcareous shale 20% - 751/o; massive, fine-grained, dark gray to pale bluish -gray, ashy bentonite and bentonite 100/0 - 40%; massive, fine to medium -grained, light to dark gray to greenish -gray to sea -green, locally limy ash 10% - 20%; massive, fine to medium -grained, bluish -gray to gray -brown impure lime- stone; laminated, gray -brown shale; primary pyrite; brown to white calcite veinlets and fragments. DRILLED 5280 - 5310 Interbedded or streaked - massive, fine-grained, pale bluish - gray ashy bentonite and bentonite 4016 - 70% massive, fine to medium -grained, bluish -gray, limestone 0% - 10016; massive, cherty, brownish -black, slightly calcareous shale 5016 - 10%; massive, fine to medium -grained, light to dark gray to greenish -gray to sea -green locally limy ash 5% - 30%; minor, massive, medium -grained, dark gray, limy sandstone; brown to white calcite veinlets and fragments. -44- 5310 - 5338 Interbedded or streaked - massive, fine-grained, soft to medium hard, light to dark bluish -gray to light brownish - gray, ashy bentonite and bentonite 30 - 601o; massive, fine to medium -grained, light to dark gray to greenish -gray to sea -green, locally limy ash 10% - 30%; massive to laminated, gray -brown to brownish -black, locally cherty and calcareous shale 2010 - 30%; massive, fine to medium -grained, light gray -brown to pale bluish -gray limestone; minor primary pyrite and brown to white calcite. CORE 5338 - 5346 6' recovery. Massive, to finely laminated, fine to medium - grained, soft to medium hard, pale bluish -gray to pale greenish -gray to pale greenish -blue to pale brownish -gray, ashy bentonite and bentonite. Laminated portions show poor bedding. Small inclusions of white to bright greenish, coarse-grained calcite. Core severly fractured at intervals with fractures, from hairline to 1/4" thick, lined with white to brown calcite and minor dead oil stain. Considerable slickensiding along fractures. Dip 250. DRILLED 5346 - 5375 Interbedded and streaked - massive, fine-grained, soft to medium hard, gray to pale bluish -greenish -gray, ashy bentonite and bentonite 30% - 7076; massive, fine to coarse- grained, medium hard, light to dark gray to greenish -gray to bright sea -green, locally limy ash 20% - 30%; massive, to laminated, fine-grained, hard, gray -brown to brownish - black locally cherty and calcareous, shale 300/6 - 351a; minor massive, medium -grained, speckled greenish -gray, limy sandstone; massive, fine-grained, buff to bluish -gray limestone; primary pyrite; brown to white calcite with some oil stain. 5375 - 5420 Interbedded and streaked - massive, fine-grained, soft to medium hard, light to dark bluish -gray locally limy bentonite 20% - 30%; massive to laminated, fine to medium - grained, light to dark gray to greenish -gray, locally limy ash; massive, to laminated, fine-grained, gray -brown to brownish -black, calcareous shale 20% - 401o; minor massive, fine-grained, buff to bluish -gray limestone; primary pyrite; brown to white calcite veinlets and fragments. 5420 - 5455 Interbedded and streaked - massive, fine-grained, medium hard, dark gray to brownish to greenish -gray, limestone 20016 - 6016; massive, fine-grained, medium hard, gray -brown to brownish -black, calcareous shale and limestone 25% - 4519; -45- massive, fine-grained, pale bluish gray bentonitic shale 20% - 25%; massive, medium -grained, light to dark gray to sea -green, locally limy ash 101a - 20%; brown to white calcite veinlets; between 5420 - 5430 - massive, very fine- grained, hard cherty, dark gray, slate 300/6. 5455 - 5490 Interbedded and streaked - massive to laminated, fine-grained, medium hard, gray -'brown to brownish -black, calcarous shale and gray -brown limestone 2510 - 501o; massive to laminated, fine-grained, light to dark bluish -gray, bentonitic shale 20% - 40%; massive, fine to medium -grained, dark gray to bluish -gray, limestone 2010 - 30%; massive to laminated, fine to coarse-grained, light to dark gray (locally speckled) to sea -green, locally limy, ash 1010 - 20%; minor amounts . primary pyrite; tarry oil; brown to white calcite veinlets and fragments. 5490 - 5515 Interbedded and streaked - massive to laminated, fine-grained, medium hard, gray -brown to brownish -black, calcareous shale 251c - 301c; massive.to laminated, fine-grained, light to dark bluish -gray to brownish -gray, bentonitic shale 25% - 50%; massive, fine-grained, buff to greenish -bluish -gray, limestone 1016 - 4016; massive to laminated, speckled light to dark gray to greenish -gray to sea -green, fine to coarse-grained, locally limy, ash'100/o 2016; minor amounts primary pyrite; taery oil; brown to white calcite veinlets and fragments. 5515 - 5540 Interbedded or streaked - massive, very fine-grained, soft to medium hard, light to dark bluish -gray bentonitic shale 30%; massive to laminated, medium hard, gray -brown to brownish -black, locally cherty, calcareous shale 301o; massive to laminated, soft to medium card, light to dark gray (locally speckled) to sea -green locally limy ash 10% - 151o; massive, fine-grained, gray -brown to light bluish -gray, limestone 151o. Minor amounts brown to white calcite veinlets and fragments. 5540 - 5565 Interbedded and streaked - massive, fine-grained, buff to bluish -gray, limestone 25% - 60%; massive to laminated, medium hard, gray -brown to brownish -black, locally cherty, calcareous shale 20% - 251o; massive to laminated, soft to medium hard, light to dark bluish -gray bentonitic shale 150/0 - 20%; massive to laminated, soft to medium hard, fine to coarse-grained, light to dark gray (locally speckled) to sea - green, locally limy, ash 510 - 250/o., Minor brown to white calcite veinlets and fragments. DRILLED 5565 - 5585 Interbedded and streaked - massive to laminated, hard, locally cherty, fine-grained, light gray brown to brownish -black, -46- 7 calcareous shale 2516 - 401o; massive, very fine-grained, light to dark gray -blue, bentonitic shale 2010 - 30%; massive to laminated fine to coarse-grained, light to dark gray to sea - green ash 200/6 - 25%; massive fine-grained, buff to bluish - gray limestone 510 - 251o; brown to white calcite veinlets and fragments. 5585 - 5629 5' - 10' beds of limestone and calcareous shale with thin interbeds of bentonite and ash. Lithology - massive, locally cherty, fine-grained, gray -brown to brownish -black calcareous shale 30% - 65%; massive, fine-grained, light to dark bluish - greenish -gray limestone 510 - 70%; massive to laminated, fine-grained, light to dark bluish -gray bentonite 1016 - 30%; massive to laminated fine to coarse-grained, light to dark gray (locally speckled) to sea -green, locally limy ash 1010,= 20%. Minor disseminated pyrite and brown to white calcite veinlets. CORE I5629 - 5640 1' recovery. Only small. pieces recovered so no lithologic sequence possible, Massive, very fine to medium -grained, conchoidal fracture, hard, dark bluish -brownish -gray, silty, slightly calcareous to strongly calcareous shale and limestone. Massive, medhmi to coarse-grained, speckled gray-bl :e, sandy limestone or limy sandstone. Massive, medium -grained, dark gray -brown impure limestone. No fractures or calcite seen. Dip unobtainable. IDRILLED 5640 - 5660 Interbedded - massive, very fine-grained, hard, dark bluish to brownish -gray, slightly calcareous, silty, shale and silty limestone 2016 - 75%; massive to laminated, light to dark bluish -gray bentonite 0% - 10%; massive, fine-grained, brownish -gray, limestone 0% - 50%; massive to laminated, fine to coarse-grained, light to speckled dark gray to sea - green locally limy ash 5% - 20%; minor primary pyrite and brown to white calcite. CORE _ 5660 - 5664 11 recovery. Only scattered pieces recovered. Massive, fine-grained, soft to medium hard, dark greenish to bluish - gray, arenaceous shale which locally contains small semi - angular grains of ash. Massive, very fine-grained, chert., medium hard, gray -brown, arenaceous shale. Massive, medium -grained, brownish -gray, limestone which locally contains small grains of dark colored ash. Some of the shale -47- a 11 is thinly banded with lamin ae of greenish -gray bentonite. A few small fractures lined with brown and white calcite. Doubtful dip of 15-200 taken from thin bentonite lamin ae. 5664 - 5667 l' recovery. Only scattered pieces recovered. Massive, fine to medium -grained, medium hard, gray -brown calcareous shale. Massive to laminated, gray -brown to greenish -gray, very fine-grained, slightly calcareous shale. I Massive, coarse-grained, greenish -gray, sandy limestone. No fractures or calcite veinlets. Doubtful dip 20-250. 5667 - 5669 No recovery. DRILLED 5669 - 5685 5' - 10' beds of shale and limestone. Massive, fine-grained, hard, bluish -brownish -black, slightly calcareous shale 400/0 - I 6016; massive, fine to medium -grained, dark gray to gray - brown impure limestone 157o - 7501o; massive to laminated, fine-grained, light to dark gray -blue bentonitic shale and ' ashy bentonite 5% - 257o; massive, fine to medium -grained, light gray to speckled dark gray, locally limy ash 5% - 20%. " Minor amounts pyrite.; brown to white calcite veinlets. CORE 5685 - 5687 2' recovery. Top 8" - heavy, thinly laminated, light to dark brownish -gray, medium -grained, impure limestone. Next " 6" - massive, medium hard, earthy -appearing, dark brownish - black, silty, slightly calcareous shale. Next 7" - massive to poorly laminated by gradation of grain size from fine to coarse, " hard, mottled brownish to bluish -gray, limy, ash, sandstone. Bottom 3t1 - massive, soft to medium hard, fine-grained, greenish -gray, bentonitic shale. Minor amounts pyrite ' scattered throughout core, both primary and secondary origin. Core fractured and shoves evidence of minor faulting. Fractures range from hairline to 1/4" thick and are lined with ' calcite. Large fractures are lens -like and contain open -pugs lined with small calcite crystals. Dead oil and residue ioi--id in all fractures and ,.-rugs. Good 20-300 dips obtained from laminated limestone. DRILLED 5687 - 5714 interbedded shale and limestone with t:un interbeds and streaks of bentonite and ash. Lithology - massive to laminated, medium hard to hard, fine-grained, gray -brown to greenish -gra -y to brownis�.L-black, calcareous shale 30% -" 40%; massive„ fine- grained, light gray -brown to bluish -greenish -gray, limestone 20% - '1'5%;. massia-e tc laminated, fine-grained, soft, light to -48- dark gray -blue bentonitic s Tale 510 - 15%; massive to laminated, fine to coarse-grained, light to dark gray to se -a -green ash 5% - 15%; minor disseminated pyrite; small quartz crystals; brown to white calcite veinlets and fragments. 5714 - 5740 Interbedded shale and limestone with interbeds of bentonite and ash. Lithology - massive, fine-grained, locally cherty, hard, gray -brown to brownish -black, calcareous shale 1510 - 35%; Imassive, fine to medium grained, brownish to bluish to greenish -gray, limestone 20% - 6076; massive to laminated fine-grained, light to dark bluish -gray, bentonitic shale 5% - ' 307o; massive to laminated, fine to coarse-grained, speckled light to dark gray to sea -green locally limy ash 57a - 10%; minor secondary pyrite; brown to white calcite veinlets and fragments. I 5740- 5765 Interbedded limestone and shale with thin interbeds of bentonite and ash. Lithology - massive, fine to medium -grained, brownish to bluish -gray, locally cherty limestone 3010 - 501o; massive, to laminated, fine-grained, locally cherty, gray -brown to brownish - black, hard, calcareous shale 3016 - 50%; massive, to laminated, fine-grained, light to dark bluish -gray, bentonitic shale 5% - 151o; massive to laminated, fine to coarse-grained, light to dark gray - (locally speckled) to sea -green, locally limy ash 5% - 1516; minor pyrite; oil stained calcite; brown to white calcite veinlets and fragments. Considerable hard, bl-aish-gray, chert at 5760. 5765 -5780 Interbedded limestone and calcareous shale in beds from 6" to 5' with thin interbeds of bentonite and ash. Lithology - massive, fine to medium -grained, buff, gray -brown to bluish -gray, lime- stone 2016 - 501o; massive to la-minated, fine-grained, locally cherty, hard, gray -brown to brownish -black, calcareous shale 3016 - 3516; massive to laminated, tine -grained., light to dark bluish -gray, bentonite 10% „ 157o; massive to laminated, light to dark gray to bluish -gray to sea -green, locally limy, medium -grained, ash 1010 - 15%. Minor pyrite, brown to white calcite veinlets. 5780 - 5802 Interbedded limestone and calcareous shale with in.tervals of laminated bentonitic shale and ash. Lit' ology •- massive to thinly laminated, fine to medium -grained, light brownish, greenish, bluish -gray, limestone 250/o - 5516; massive, to laminated, fine, hard, gray-bro-,,7n to brownish -black, calcareous -shale 10% - 4010 aver .3516; massive to finely laminated, very fine to fire -grained, light brownish to bluish to greenish gray bentonitic shale 10% - 40% average 15%; massive to laminated, fine to oars e -grained, light gray to sea -green, locally limy ash 106/6; minor pyrite. gilsonite or carbon, brown to 'Arhite c:axc to -e-inlets. -49- CORE 5802 - 5806 4' recovery. Top 2' - thinly bedded, massive to finely laminated soft, light brownish to greenish -gray, very fine-grained, cleavable, bentonitic shale.. Next 8" - massive to poorly laminated with varves from fine to coarse-grained, medium hard, gray, ashy, limestone. Next 10" - thinly bedded, finely laminated light brownish - •bluish- greenish- gray, fine-grained, bentonitic shale. Bottom 6" - consists of a brecciated zone in which bentonitic shale, calcareous shale etc. have been broken and recemented by calcite. Core slightly broken through- out by hairline and less to 1/8" calcite -lined fractures. Dead oil in brecciated zone and fractures. Dip 15-400. Core sample taken from 5804 for orientation. DRILLED 5806 - 5821 Interbedded calcareous shale, limestone and limy sandstone with minor amounts ash, bentonite and near 5806 brecciated material. Lithology - massive to laminated, fine-grained, cherty, brownish -black, calcareous shale average 201o; heavy thin -bedded, possibly thinly laminated, med.iimm hard, fine-grained light brownish -greenish -bluish -gray, ashy, sandy limestone and limy sandstone (from 5815 on) 60,%6 massive to laminated, light broRwnish-bluish- greenish- gray ' bentonite • average 10%; minor pyrite and brown to white calcite veinlets. CORE ' 5821- 5822 10" recovery. Heavy, thin -bedded, finely laminated, hard, fine to medium -grained, light pepper and salt gray, limy, ashy, sandstone to sandy limestone. Core contains one 1/8" calcite -lined fracture and a few hairline fractures. A little dead or.l. Core samples taken for orientation. Dip 20-300. DRILLED 5822 - 5834 Interbedded sandstone, calcareous shale and limestone with. laminae of bentonite and ash. Lithology _' heap; , , thin -bedded, finely laminated, fine to medium -grained, light pepper and salt gray, limy, ashy sandstone 60% formation to 5830; massive to laminated, fine, medium �nard, locally cherty, gray --brown to brownish -black, calcareous shale 1510 - 70%; massive to laminated, fine, soft, light brownish -bluish. -gra; bentonite 10%; minor amounts liglst gra7,7 to sea -green ash, pyrite, t::oke-like material, brosYrn to white calcite , einlets. -50- CORE 5834 Cored 4 hours but made no hole. DRILLED 5834 - 5859 Interbedded calcareous shale, sandy limestone and limestone with thin interbeds of bentonite and ash. Lithology - massive to laminated, fine-grained, hard, gray -brown to brownish - black, calcareous shale 207o - 40% average 3516; heavy, thinly bedded and laminated, light gray to brownish -gray to pepper and salt gray, fine to medium -grained, locally sandy limestone 4016 average; massive to laminated, soft to hard, fine to very fine-grained, light bluish to dark greenish -gray, bentonitic shale 2016 average; massive to laminated, fine to coarse-grained, light gray to sea -green, locally limy ash 10% average. Minor amounts secondary pyrite, brown to white calcite veinlets. CORE 5859 - 5859. 8 4" recovery. Heavy, thin -bedded, laminated, light brown- ish -gray to dark gray -brown (Laminae 1/8" thick), fine-grained, extremely hard, calcareous quartzite to quartzitic limestone. One thin calcite -lined fracture. Sample sent for orientp.'i!on. DRILLED 5859.8-5876 Predominantly sandy limestone down to 58651; 5865 - 5870 predominantly calcareous shale; 5870 - 5875 interbedded limestone, calcareous shale, chert, bentonite. Lithology - heavy, thin -bedded and liminated, light brownish to greenish -gray, sandy limestone and limy sandstone 30% - 70%; massive to laminated, fine, very dark brownish -black calcareous shale 2010 - 90%; massive to laminated, flne, light to dark bluish -gray, bentonitic shale 510 - 20%; minor - light to dark gray to sea -green, fine to coarse, locally limy ash; dense, very fine, blue -gray cher:; gilsonite or carbon; hairline brown to white calcite lined fractures. CORE Cored 3 hours making 3" but no recovery. DRILLED 5876 - 5916 Predominantly calcareous shale with thin interbeds of limestone; sandy limestone, bentonite and ash. Lithology - massive to thin -bedded, dense to finely laminated, medium -51- L2 1 hard to very hard, gray -brown, dark brownish to bluish - black, dark greenish -black, calcareous shale 2010 - 8010 average 751o; heavy, thin -bedded and laminated, fine to very fine-grained, gray, pepper and salt gray, brownish - gray, limestone with local sandy laminae, between 5880 - 5890 60% otherwise 5% - 10%; massive to laminated, fine, soft to medium hard, light to dark bluish -gray, bentonite 100/a massive to laminated, fine to coarse, light to dark gray to sea -green ash 10%; minor amounts chert, pyrite, coal or gilsonite; brown to white calcite -lined fractures from hairline to 1/8". CORE 5916 - 5922 2' recovery, material consisted of isolated fragments. Heavy, dense, thin -bedded, fine-grained, light brownish - gray to dark brownish -black, ,eery calcareous shale or impure limestone. No sign of bedding planes. Core badly fractured with large number of hairline to 1/4" white calcite -lined crack7. At least one brecciated zone in which gouge and fragments of shale are recemented in open spaces in fractures and brecciated zone. No indication of. dip. DRILLED 5922 - 5931 Heavy, dense, thin -bedded, fine-grained, light brownish - gray to dark brownish -black, very calcareous shale or impure limestone 90%; thin interbeds of bentonite and ash with minor amounts of coal or gilsonite; brown to white calcite veinlets. CORE 5931 - 5934 3° recovery. Top 10" - heavy, dense, fine-grained, hard, dark brownish -black, very calcareous shale or impure limestone. Next 22" - Thin -bedded, dense to finely laminated, very fine, soft, light bluish -gray to brownish - gray, benfonitic shale. Bottom 4" - thin -bedded, dense, fine to medium -grained, bluish -gray, slightly limy, ashy, bentonite. Contact with overlying bentonite appears flat, but no good bedding planes were seen and no dip obtained. Calcareous shale broken by several hairline to 1/16" white calcite -lined fractures. Bottom 10" traversed by a 1/8" - 1/4" banded white to brown calcite -filled fracture. A little tarry oil along fracture planes. DRILLED 5934 - 5962 Predominantly dark calcareous shale with interbeds of bentonite which make 'up about 30% of formation. 7 Lithology - Heavy, thin -bedded, dense, cherty to fine- grained, hard, dark brownish -black, very calcareous shale or impure limestone 60% - 75%; massive to lami- nated, soft to medium hard, locally cherty and limy, light to dark bluish -gray, bentonitic shale 207o - 35%; minor coarse, light to dark gray ash; medium, brownish - gray, limestone; coal; pyrite; brown to white calcite veinlets. CORE 5962 - 5964 2' recovery. Core consisted entirely of heavy, dense, cherty to fine-grained, locally rudely laminated, hard, dark brownish - black, very calcareous shale or impure limestone. One 1/4" streak of soft, dark bluish -gray bentonite. Core well broken with vertical, hairline to 1/16" fractures lined with white calcite and containing considerable tarry oil with strong gasoline odor. Approximate dip 15-250. DRILLED 5964 - 6012 5964 - 5995 predominantly calcareous shale or impure limestone with thin laminae of ash and thin interbeds of bentonite; 5995 - 6012 predominantly dark bluish -gray ashy, limy, bentonitic shale. .Lithology - heavy, thin -bedded, very fine-grained and cherty to fine-grained, hard, dark brownish -black, very calcareous shale to impure limestone 80%; massive to laminated, soft, dark bluish -gray, bentonitic shale 20%; thin -bedded, dense, medium -grained, soft to medium hard, dark bluish -gray limy, ashy, bentonitic shale 9001o; minor amounts fine to coarse, light to dark gray to sea -green ash; coal, pyrite, brown to white calcite veinlets. CORE 6012 - 6016 41 recovery. Thin -bedded, dense or massive, to rudely laminated, very fine-grained, (conchoidal fracture) to fine- grained, hard, dark gray -brown to dark brownish -black, very calcareous shale to impure limestone. Several 1/4" - 1" streaks of rudely laminated, dark bluish -gray, bentonitic shale which shows a little fine, disseminated pyrite. Core broken and recovered in pieces. Considerable number of white calcite -lined hairline fractures which occasionally reach 1/4" in thickness. Most fractures are vertical but a few nearly horizontal.. Tarry oil and oil stain along all fracture planes with gasoline odor. Dip 0-150. Dip appears flatter but bedding rather poor. -53- IDRILLED CORE 6067 - 6076 91 recovery. Top 12" - thin -bedded, finely laminated, light to dark brownish -gray, medium hard, silty shale; grades into next 12" - thin -bedded, massive to finely laminated, coarse- grained, gray, sandy ash; sharp contact with next 12" - tbin- bedded, massive fine-grained, medium hard, dark rich brownish -black, non -calcareous shale; sharp contact with next 3' - thin -bedded massive to finely laminated, .very fine to medium grained, light to dark bluish -gray, bentonitic, and ashy bentonitic shale. Bottom 3' - thin -bedded, massive, fine to very fine-grained, medium 'hard, locally flaky, dark brownish -black, calcareous shale. Several thin streaks, up to 211, of finely laminated, coarse, gray ash. Core badly broken with the calcareous shale members being the worst. These shales are intimately traversed by many vertical, hairline, white calcite -lined fractures and at several places are severely brecciated and recemented by calcite. There is a large amount of slickensiding all through the core. Heavy tarry oil, oil stain and gasoline odor were noted along some of the fracture planes. Dip 0-150. -54- 6016 - 6047 6016 - 6025 Thinly interbedded calcareous shale, bentonite, ash, and limestone. 6025 - 6047 predominantly calcareous shale with thin interbeds of bentonite and streaks of ash and impure limestone. Lithology - heavy, thin -bedded, very fine (conchoidal fracture) to fine, medium hard, dark grav- brown to brownish -black, calcareous shale; massive to laminated, soft, dark bluish -gray, bentonitic shale; massive to laminated, fine to coarse-grained, light to dark gray to sea -green, locally limy_a,s-h; massi,re, possibly laminated, medium -grained, lustrous gray -brown, impure limestone; minor amounts pyrite, brown to white calcite fragments and hairline calcite veinlets. DRILLED 6047 - 6067 Predominantly thin -bedded calcareous shale with thin interbeds and streaks of bentonite and ash. Lithology - heavy, thin -bedded, very fine to fine-grained, medium hard, dark gray -brown to dark brownish -black, calcareous shale to impure limestone; massive to laminated, soft, fine-grained, dark bluish -gray, bentonitic sha.l e 101a average; massive, thin -bedded or as streaks fine to coarse-grained, light to dark gray to sea -green ash 5%; minor amounts V%:.dn- bedded, massive to laminated, coarse, bluish to brownish - gray, sandy, limestone; secondary pyrite; coal. hairline brown to white calcite 7reinlets. CORE 6067 - 6076 91 recovery. Top 12" - thin -bedded, finely laminated, light to dark brownish -gray, medium hard, silty shale; grades into next 12" - thin -bedded, massive to finely laminated, coarse- grained, gray, sandy ash; sharp contact with next 12" - tbin- bedded, massive fine-grained, medium hard, dark rich brownish -black, non -calcareous shale; sharp contact with next 3' - thin -bedded massive to finely laminated, .very fine to medium grained, light to dark bluish -gray, bentonitic, and ashy bentonitic shale. Bottom 3' - thin -bedded, massive, fine to very fine-grained, medium 'hard, locally flaky, dark brownish -black, calcareous shale. Several thin streaks, up to 211, of finely laminated, coarse, gray ash. Core badly broken with the calcareous shale members being the worst. These shales are intimately traversed by many vertical, hairline, white calcite -lined fractures and at several places are severely brecciated and recemented by calcite. There is a large amount of slickensiding all through the core. Heavy tarry oil, oil stain and gasoline odor were noted along some of the fracture planes. Dip 0-150. -54- DRILLED 6076 - 6094 6076 - 6080 predominantly dark calcareous shale; 6080 - 6094 interbedded bentonite and ash. Lithology - thin -bedded, massive, very fine to fine-grained, dark brownish -black, calcareous shale; massive to laminated, very fine-grained, soft, light to dark gray to dark bluish -gray, bentonitic shale; massive, thin -bedded, possibly laminated, medium grained, bluish -greenish -gray, bentonitic ash; minor amounts brown to white calcite fragments and veinlets. 6094 - 6117 Thin bedded calcareous shale, bentonite, ash, limestone and tuffaceous ash. Lithology - Heavy, thin -bedded, fine-grained, medium hard, dark gray -brown to brownish -black, calcareous shale 30% average; massive to laminated, thin -bedded, soft, dark bluish -gray, bentonitic shale 5% - 80%; massive, thin - bedded, coarse-grained, poorly sorted, light to dark copper greenish -gray, locally limy tuff to tuffaceous limestone and ash 30%; massive to laminated, medium -grained, light greenish to brownish -gray limestone 101o; minor light gray to sea -green ash; brown to white calcite veinlets. 6117 - 6133 Interbedded calcareous shale, bentonite, limy ash, limestone etc. Lithology - thin -bedded, massive to rudely laminated, fine-grained, medium hard, gray -brown to dark browni-- - black calcareous shale 35%; massive to laminated, soft dark bluish -gray, bentonite 30%; thin -bedded, laminated, fine to coarse-grained, light to dark gray, pepper and salt gray to _ sea -green locally limy ash 15%; minor amounts thin -bedded, medium -grained, gray -brown to dark gray, impure limestone; _ dark greenish -gray tuffaceous limestone; pyrite; brown to white calcite veinlets and fragments. CORE 6133 - 6137 41 recovery. Top 10" - thin -bedded, rudely laminated, and spotted by inclusions, very fin a grained, pale greenish -gray to light gray -brown locally limy bentonitic shale which contains dark greenish, medium -grained, limy inclusions, _ Next 15" - thin -bedded, massive, fine-grained, gray -brown, non -calcareous,, shale with spots and thin laminae of dark greenish, medium -grained ash. Next 14" - massive, thin - bedded, medium -grained, mottled, pale greenish to gray - brown, locally calcareous ash. Bottom 9" - massive, thin -bedded, medium to coarse-grained, gray -brown to _ brownish -gray, limy siltstone to ashy limestone. Core as whole not broken but a few calcite -lined vertical fractures up to 1/8" appear along with se -.neral calcite -lined vugs. Oil stain along most fracture planes. Dip uncertain as bedding planes and laminations wavy. -55- I 6170 - 6175 5' recovery. Massive, dense, fine-grained, to locally cherty, medium hard to hard, locally flaky, light to dark gray brown, calcareous shale. Core moderately broken with vertical, hairline to 1/4" white calcite -lined fractures. One fissure filled with finely crystalline pyrite or marcasite. Fractures contain oil stain and tarry oil.. Dip not obtainable, owing to massive character of shale. DRILLED 6175 - 6200 6175 - 6187 predominantly dark calcareous shale; 6187 - 6200 interbedded calcareous shale and pale greenish bentonitic ash with minor streaks of ordinary bentonite, ash and limestone. Lithology - massive, dense, fine-grained, dark gray -brown, calcareous shale 40% abo'-re 6187; massive, thin -bedded, possibly laminated, fine to medium -grained, soft, pale greenish -gray, bentonitic ash; minor amounts - laminated, fine to coarse-grained, pepper and salt gray to light to dark gray to greenish -gray locally limy ash; massive, fine to medium -grained, gray limestone; dark bluish -gray bentonite; brown to white calcite fragments. -56- DRILLED 6137 - 6155 Thinly interbedded limestone, bentonite, ash and calcareous shale. Lithology - massive, thin -bedded, fine-grained, _ medium hard, locally flaky, gray -brown to dark brownish - black to dark greenish, ashy calcareous shale to impure limestone, 4576; massive to laminated, fine-grained, soft but locally cherty dark bluish -gray, bentonitic shale 30%; massive, thin -bedded, rudely laminated, fine to coarse- grained, light to dark gray to sea -green, locally limy ash 10%; minor amounts gray to greenish -gray limestone; pyrite; brown to white calcite veinlets and fragments. 6155 - 6170 Predominantly calcareous shale with thin intervals of bentonite, impure limestone and ash. Lithology - massive, thin -bedded, fine-grained, medium hard, gray -brown to dark greenish -brownish -black, locally. ashy, calcareous shale to impure limestone 5576; massive to laminated, soft to locally cherty, light to dark bluish -gray to greenish, bentonitic shale 25%; thin -bedded, massive to laminated, soft, fine to coarse-grained, light to dark gray to greenish - gray, locally limy ash 151o; minor amounts - vari-colored limestone; chert; coal; pyrite; brown to white calcite fragments. CORE 6170 - 6175 5' recovery. Massive, dense, fine-grained, to locally cherty, medium hard to hard, locally flaky, light to dark gray brown, calcareous shale. Core moderately broken with vertical, hairline to 1/4" white calcite -lined fractures. One fissure filled with finely crystalline pyrite or marcasite. Fractures contain oil stain and tarry oil.. Dip not obtainable, owing to massive character of shale. DRILLED 6175 - 6200 6175 - 6187 predominantly dark calcareous shale; 6187 - 6200 interbedded calcareous shale and pale greenish bentonitic ash with minor streaks of ordinary bentonite, ash and limestone. Lithology - massive, dense, fine-grained, dark gray -brown, calcareous shale 40% abo'-re 6187; massive, thin -bedded, possibly laminated, fine to medium -grained, soft, pale greenish -gray, bentonitic ash; minor amounts - laminated, fine to coarse-grained, pepper and salt gray to light to dark gray to greenish -gray locally limy ash; massive, fine to medium -grained, gray limestone; dark bluish -gray bentonite; brown to white calcite fragments. -56- 6200 - 6228 Interbedded calcareous shale and pale greenish bentonitic ash with streaks ordinary bentonite and ash. Lithology - massive, thin -bedded, medium hard, fine-grained, gray - brown to dark brownish -black, calcareous shale and impure limestone 40%; massive, dense, medium hard, medium to coarse-grained, locally cherty, pale grayish -green, possibly bentonitic, sandy ash 30%; massive to laminated, soft, light to dark gray to bluish -gray, bentonite 101o; massive, thin - bedded, medium to coarse-grained, soft, light to dark gray to brown, locally limy ash; minor pyrite; brown to white calcite fragments. CORE 6228 - 6235 7' recovery. Top 3'6" - massive, thin -bedded, well indurated, soft to medium hard, locally silicified, medium to coarse- grained, pale grayish -green, possibly bentonitic and sandy ash with scattered very small greenish particles. At 3'6" a 4" inclusion of dense, medium -grained, lustrous gray -brown, I - limestone. Occasional small inclusions of gray -brown limestone throughout the top section of core. Gradational contact with bottom 3'6" - massive, thin -bedded, medium hard, fine to medium -grained, very pale grayish -green, locally limy, possibly bentonitic and sandy ash. Only one or two very small poorly defined fractures. No dip obtained owing to mas:s1vp character of the formation. DRILLED ' 6235 - 6260 6235 - 6250 Interbedded calcareous shale and grayish -green ash. Lithology - massive, thin -bedded, medium hard, fine- grained, gray -brown to dark brownish -black, calcareous shale and impure limestone; thin -bedded, massive, medium to coarse-grained, soft pale grayish -green, locally limy, ash; streaks of light to dark gray to dark bluish -gray bentonite; calcite fragments etc. 6250 - 6260 Interbedded calcareous shale and coarse, tuffaceous ash. Lithology - calcareous shale same as above 20ojo; thin -bedded, massive, coarse-grained, medium hard to hard, contains considerable silica glass particles, locally limy, coarsely mottled, dark green - pale grayish -green, sandy, tuffaceous ash 70016; minor ordinary dark bluish -gray bentonite; gray ash; calcite fragments. 6260 - 6272 Predominantly dark calcareous shale with thin interbeds of tuffaceous ash, bentonite and ordinary ash. Lithology - massive, thin -bedded, fine-grained, medium hard, gray - brown to dark brownish -black, calcareous shale and impure limestone 451o; massive, thin -bedded, coarse-grained, hard, (contains glass), silicious and limy, coarsely mottled, brown -57- to bluish -greenish -gray, sandy tuffaceous ash (found above 6265); massive to laminated, fine, soft, light to dark gray to bluish -gray, bentonitic shale 300%; massive to laminated, fine to coarse, light to dark gray to greenish, locally limy ash; minor amounts vari-colored limestone; pyrite; brown to white calcite fragments and veinlets. CORE 6272 - 6277 5' recovery. Top 1' - thin -bedded, finely laminated, soft to medium hard, fine-grained, interlaminae light to dark bluish -gray to light gray -brown, bentonitic shale with thin limy laminae. Gradational contact with next 2' - thin -bedded, finely laminated, medium hard to hard, fine to coarse-grained, pale grayish -green, locally gritty and limy, bentonitic ash. Several small areas of fine streaks of dark brownish -black calcareous shale. Bottom 4" of this section of core, coarse, gritty, silicious, limy, very hard, pyritized ash. Sharp contact with bottom 2' - thin -bedded, thinly laminated, soft fine, gray -brown calcareous shale, intimately interbedded with very thin to 1/2" streaks of light green to pale bluish - gray bentonitic shale. Core practically unfractured and very minor amounts of calcite. Dip 20-300 . DRILLED 6277 - 6300 Thinly interbedded calcareous shale, impure limestone, bentonite and ash. Lithology - thin -bedded, massive to - finely laminated, soft to medium hard, fine-grained, gray - brown to dark brownish -black, calcareous shale and impure limestone 50%; thin -bedded, thinly laminated, soft, fine- grained, light to dark bluish -gray, bentonitic shale 30%; thinly laminated, fine to coarse, soft to hard, light to dark gray, greenish -gray, pepper and salt gray, locally limy Iash 15%; minor amounts pyrite; brown to white calcite fragments and veinlets. 6300 - 6350 Thinly interbedded: massive to laminated, fine to medium - grained, medium hard to Bard, gray -brown to Jark brownish - black calcareous shale and impure limestone 30-8016 average 651o; massive to laminated, fine, soft to hard, light to dark bluish -gray, bentonitic shale 100/6-60% a", erage 20%; massive to laminated, fine to coarse, soft to medium hard, light to dark to pepper and salt gray to sea -green, locally gritty, limy etc. , ash 5016-30% average 10%; minor pyrite; brown to white calcite fragments and veinlets. 6350 - 6374 Predominantly calcareous shale and : mpure limestone with thin interbeds of bentonite and ash. Formation makes very • -58-, slow drilling. Lithology - massive to laminated, fine-grained, medium hard to hard, gray -brown to dark brownish -black, calcareous shale and impure limestone; shale is locally very fine-grained with a conchoidal fracture. Massive to laminated, fine-grained, soft to hard, light to dark gray -blue, locally ashy, bentonitic shale 20%; massive to laminated, fine to coarse-grained, soft to hard, light to dark to pepper and salt gray, sea -green, locally contains glass, ash 1516. Minor amounts blue -gray, chert; pyrite; brown to white calcite fragments and veinlets up to 1/8" thick. 6374 - 6400 Predominantly dark calcareous shale and gray -brown limestone with thin interbeds of benton-11te and ash. Lithology - massive to laminated, very fine to fine-grained, medium hard to hard, gray -brown to dark brownish black, locally platy, calcareous shale and impure limestone 70%; massive to laminated, soft to medium hard, fine to coarse-grained, white, light to dark gray, pepper and salt gray, sea -green, locally limy ash 201o; massive to laminated, soft to medium hard, fine- grained, light to dark bluish -gray, bentonitic shale 10% 20%; minor amounts pyrite, coal, hairline calcite veinlets. 6400 - 6425 Predominantly dark calcareous shale and impure limestone with thin streaks and interbeds of bentonite and ash. Lithology - massive to laminated, possibly tlainl.y bedded, fine-gt:ained, medium hard to very hard, gray -brown limestone and dark brownish -black calcareous shale 70%; massive to laminated, fine-grained, soft to medium hard, light to dark bluish -gray, bentonitic shale 15%-2 0%; massive to laminated, 'fine to coarse-grained, soft to medi,= hard, light to dark gray, pepper and salt gray, green., ash l0 jo-15%, minor amounts pyrite and brown to white calcite veinlets. 6425 - 6435 Predominantly calcareous shale and limestone with thin I interbeds of bentonitic shale and ash. Lithology - massive, fine-grained, hard,., gray -brown to dark 'brownish -black calcareous shale and limestone 751o; massive to finely laminated, soft to medium hard, light to dark bluish -gr -ay, bentonitic shale 15%; massive to laminated, fine to coarse- grained, soft to medium hard, light to dark gray, green, ash 5%; minor white calcite veinlets and fragments. CORE - T 6435 - 6437 2' recovery. Thinly bedded i-iard calcareous shale and bentonite w-th a few very i7hin streaks of coarse ash. Shale in beds from 3" - 1'; bentonite 1/2" - 6''; ash 1/8". Lithology - massive, thinly bedded, f:ne to very fine-grained, locally with conchoidal fracture, hard lustrous gray --brown to dark brownish -black calcareous shale; massive to finel>7 laminated, -59- J � J T soft to medium hard, light to dark bluish -gray bentonitic shale; coarse-grained, pepper and salt gray ash. Bedding planes very distinct. Few small fractures lined with calcite veinlets from hairline to 1/8" thick. Little, if any, oil stain. Dip 30 - 400. DRILLED 6437 - 6470 6437 - 6450 predominantly thinly bedded dark calcareous shale and limestone with thin interbeds of bentonite and ash. 6450 - 6465 predominantly limy ash with thin interbeds of bentonite and calcareous shale. Lithology - massive, fine- grained, hard, gray -brown to dark brownish -black calcareous shale and limestone N jo-70%; massive to thinly laminated, fine-grained, soft to medium hard, light to dark bluish -gray with light brown streaks, bentonitic shale 10%-15%; massive, possibly laminated, medium to coarse-grained, soft to medium hard, gray, locally ashy limestone 0%-25%; massive to lami- nated, medium to coarse-grained, soft to medium hard, light to dark. greenish -gray to gray, locally contains abundant transparent glass, locally limy, ash 15%-30%; minor amounts coarse, white to gray limestone; hairline to 1/8" brown to white calcite veinlets (mostly in the dark calcareous shale); pyrite. 6470 - 6480 Thinly interbedded calcareous shale, bentonite, gray.li.mestone, and ash in about equal proportions. Lithology - massive, fine-grained, hard, gray -brown to brownish -black calcareous, shale; massive to finely laminated, soft to medium hard light to dark bluish -gray with thin gray -brown lamellae, bentonitic shale; massive to finely laminated, fine to coarse-grained, soft to medium hard, light to dark gray, greenish -gray green, locally contains abundant transparent glass, ash; massive, coarse-grained, gray limestone; minor calcite veinlets. 6480 - 6518 Predominantly a massive, coarse, tuffaceous sandstone which locally becomes a quartzite with thin interbeds of dark calcareous shale, ash and bentonite. Lithology - massive, medium to very coarse-grained (almost pebbly in places), medium hard to extremely hard, pale greenish to brownish - gray locally limy, locally very silicious, ashy or tuffaceous sandstone. The medium -grained sandstone where cemented by silica forms quartzite (6489 - 6508). CORE 6518 - 6521 17 recovery. Massive, medium hard, medium to very coarse- grained, pale greenish -gray, tuffaceous sandstone. Sandstone contains abundant quartz. gray to green ash, transparent silica glass, shale fragments and grain sorting poor. Cementing -60- DRILLED 6570 - 6585 Massive, very fine to fine-grained, hard, dark gray -brown to black, very calcareous shale or impure limestone 95% of formation with a few thin streaks of light to dark bluish - gray bentonitic shale and fine to coarse-grained, gray to green ash. A few thin calcite veinlets. 6585 - 6629 Thinly interbedded dark calcareous shale; impure limestone, bentonitic shales and ash. Lithol.ogy - massive, hard, fine- grained, dark gray -brown to black, calcareous shale and dark gray -brown impure limestone 50% - 75%; massive to laminated, fine-grained, soft to hard, light to dark bluish -gray to green- ish -gray, locally silicious and ashy, bentonitic shale 5% - 25%; massive to thinly laminated, soft to medium hard, fine to coarse-grained, white, light to dark gray, greenish -gray to sea -green, locally silicious and limy, ash locally appears like gray, limy, siltstone) 10% - 25%; thin streaks gray, medium -grained limestone; coarse-grained, greenish -gray, sandstone; fragments of pyrite; white calcite veinlets from hairline to 1/16". NOTE - at 6225 mud returns dropped from 88 to 75 lbs, for about 5 minutes and then immediately regained weight; ditch covered with bubbles that burst; salt content of light slug same as drilling fluid. CORE 6629 - 6635 6' recovery. Top 5° - massive, locally thinly laminated, soft to medium hard, fine to medium -grained, light to dark gray to greenish -gray, possibly bentonitic, ash or ashy siltstone. Rock even -grained with poor definition of grain boundaries. Local thin streaks or laminae due to variation in grain size or color. Bottom foot - massive, coarsely mottled, soft to hard, gray to brownish -gray, silicious ash which contains abundant limy material. Core slightly fractured with brown to white calcite -reinlets from hairline to 1/811. Few vugs along fractures contain black tarry oil. Dip 25 - 400. DRILLED 6635 - 6680 Massive, ashy siltstone and sandstones with a very few thin streaks of dark calcareous shales and blue -gray bentonitic shales. Lithology - massive, fine to coarse-grained, soft to hard, silicious and contains glass, lccally bentonitic, locally limy, light to dark gray, ash-; siltstones and sand- stones. These rocks are not true siltstones or sandstones -62- a as their composition is predomin=antly asst but are described as such because of probable sedimentary origin. They are well indurated and grain boundaries are poorly defined. Minor brown to white calcite fragments and veinlets up to 1/8" with spots of tarry oil. NOTE - At 6667 gas bubbles showed on ditch and mud weight dropped from 88 lbs. to 85 lbs, for about 15 minutes then regained original weight. 6680 -6699 Thinly interbedded ashy siltstones and sandstones, calcareous shale and bentonitic shales. Lithology - massive, fine to coarse-grained, silicious, locally limy, medium hard, light to dark gray to mottled gray and brown, ashy siltstones and sandstone which contain considerable glass and brown calcite 40% - 70%; massive; fine-grained, hard, dark gray -brown to black calcareous shale 10% - 25%; massive, fine-grained, soft to hard, locally silicious, blue -gray, bentonitic shale 10% - 30%; scattered fragments of brown to white calcite veinlets; spots of tarry oil. CORE 6699 - 6703 4' recovery. Top foot - thinly laminated, soft, fine-grained, laminae of light to dark bluish -gray alternating with gray - brown, bentonitic and ashy shale. Next 1-1/2' - thinly laminated medium -grained, (even -grained, but well indurated with no definite grain boundaries), medium -hard, laminated I Lustrous light gray, greenish -gray to brownish -gray, local limy and bentonitic layers, limy ash to ashy siltstones. Bottom 1-1/2' - massive to thinly laminated, soft, medium - grained but well cemented and no definitely visible grain boundaries occasional small spots of tarry oil throughout this rock suggest some porositj/ and permeability), dark gray, ashy siltstone. Core moderately broken with fractures up to 1/4" wide. Fractures principally filled with banded brown to white calcite but small amounts of gray chalcedonic quartz, a greenish mineral and a hard, dark brownish, silicious mineral were seen. Tarry oil stains were noted along some of the fractures. Dip 25 - 300. I DRILLED ' 6703 - 6705 Massive, medium hard; medium to coarse-grained, silicious, locally limy, light to dark gray. ashy siltstones and sand- stones 90%, minor dark gray -brown calcareous shale; bento- nitic shale; brown oil stain; brown to white calcite fragments. -63- N CORE 6705 - 6708 3° recovery. Massive, fine, medium hard to hard, lustrous dark gray -brown to black, calcareous shale. Few thin streaks of gray ash. Rock moderately broken by white calcite -lined, hairline fractures which contain considerable wood tarry oil. Dip 250. DRILLED 6708 - 6720 Predominantly hard, black calcareous shale with thin streaks of ashy siltstone and sandstone and bentonitic shale. Lithology - massive, fine-grained, hard, dark brownish - black, calcareous shale; massive, fine to coarse-grained, medium hard, locally silicious and limy, light to dark gray, ashy siltstone and sandstone; fine-grained, light to dark bluish -gray bentonitic shale, brown and white calcite fragments; spots of tarry oil. 6720 - 6732 Thinly interbedded light gray -brown calcareous shale, ashy siltstones and sandstones, bentonitic shale and ash. Lithology - massive, fine-grained, hard, light gray -brown slightly calcareous shale 4010 - 70%; fine to coarse-grained, light to dark gray, silicious, ashy siltstones and sandstones 10% - 30%; blue -gray bentonitic shale; fine to medium -grained, soft, light to dark gray ash; brown and white hairline calcite: veinlets; spots tarry oil. 6732 - 6754 Thinly interbedded calcareous shale and bentonitic ash. Lithology - massive, fine, hard, gray -brown to black, cal- careous shale 8076; laminated, fine, soft to hard, light to dark bluish -gray, locally silicious bentonitic shale and ashy bentonite. Fragments brown -white calcite. 6754 - 6782 6754 - 6778 - Thinly interbedded dark calcareous shale, ashy bentonitic shale and bentonitic ash. Lithology - massive, hard, dark gray -brown to black calcareous shale 3076; massive to laminated, fine-grained, soft to medium hard, light to dark gray to bluish -gray, locally silicious, ashy bentonitic shale and bentonitic ash 60%; thin streaks coarse-grained, gray, silicious, ashy sandstone; brown to white calcite fragments and veinlets. 6778 - 6782 - Thinly interbedded bentonitic ash and coarse, silicious, gray, ashy sandstone. CORE 6782 - 6788 6' recovery. Entire core consisted of - massive, medium to coarse-grained (texture that of a quartzite rather than a sandstone as no grain boundaries clear) medium hard to -64- 6820 - 6833 Thinly interbedded gray -brown as.^.y sxltstone, bentonitic shale, ashy sandstone with thin streaks dark green ash. Lit'hology - massive, medium hard, medium -grained, silicious, locally limy, light- gra,-brown, ashy siltstone. Other rocks similar to prevoussy described i'ormations. -65- hard, well indurated and apparently impermeable, silicious (contains abundant silica minerals and glass), locally limy (probably cementing material but few small inclusions of ' brown crystalline calcite found), ashy ;bulk of material in rock,), which includes a greenish, glassy mineral, of volcanic origin, light greenish to brownish -gray, ashy ' sandstone. No definite bedding planes but clearly visible alignment of minerals or rock fragments. Occas: onal spots of dead tarry oil in rock. Few fractures from hairline to 1/8" wide lined with brown and white calcite. Dip 250? 6788 - 6791 3' recovery. Entire core consists of - massive, medium to coarse-grained (quartzitic texture), well indurated and impermeable, medium hard to hard, silicious (silica content vanie�';, locally limy, ashy, light brownish to greenish- gray, ashy sandstone containing minor amounts of pyrite. No fractures; no oil shows; dip obtainable. 6791- 6795 4' reco`rery. Top 1-1/2° - massive, hard coarse-grained, very silicious (abundant glass), dark brownish -gray, locally limy, ashy sandstone. Next 2° - massive, locally thinly laminated, soft, fine to medium -grained, locally limy, bright grayish -green with scattered inclusions of brown calcite, ash. Bottom 6t° - massive, hard, medium -grained, silicious, locally limy, light brownish -gray, ashy sandz:on.e. One or two small fractures;no oil shows; dip 25 - 300. 6795 - 6797 2' recovery. Entire core consists of - massive to locally thinly banded, hard, fine to coarse-grained, silicious, locally limy, light brownish -gray, ashy sandstone. Few hairline cracks;no oil shows; dip 25 - 300, DRILLED 6797 - 6820 Thinly interbedded coarse„ gray ashy sandstone and black calcareous shale with thin streaks bentonitic shale and green ash. Lithology - massive, hard, coarse, silicious, locally limy, gray, ashy sandstone 50%; massive, fine, hard, brownish -black calcareous shale 40%; minor blue - gray, bentonitic shale; fine to coarse-grained, soft green ash; brown and white calcite fragments. 6820 - 6833 Thinly interbedded gray -brown as.^.y sxltstone, bentonitic shale, ashy sandstone with thin streaks dark green ash. Lit'hology - massive, medium hard, medium -grained, silicious, locally limy, light- gra,-brown, ashy siltstone. Other rocks similar to prevoussy described i'ormations. -65- a CORE 6833 - 6834 11 recovery, Top 8" - *passive, hard, fine-grained, brownish - black, calcareous ,shale. Bottom 4" - laminated, coarsely mottled light brownish -gray, fine-grained, limestone with inclusions of calcareous shale. Few hairline fractures lined with white and brown calcite. Few spots tarry oil along fracture planes. Dip 30°, DRILLED 6834 - 6856 Interbedded black, calcareous shale and ashy siltstone and ashy siltstone and sandstone v ith thin streaks of bentonitic shale, and gray to green ash. Lithology - massive, fine, hard, dark brownish -black., calcareous shale; massi�-e, medium to coarse - grained, hard, s."dicious, locally limy, gray to light brownish -gray, astray siltstone and sandstone; massive to laminated, fine to medium -grained, soft, light to dark green ash; b1ae-gray, locally ashy, bentonitic shale; brown and white calcite fragments and veinlets. CORE 6856 - 6858 Z' recovery. Top 1' 9" - fine-grained, soft, locally ashy, dark bluish -gray with. thin dark brown laminae, benton4.ti.c shale. Bottom 3" - heavy, very thinly laminated, medium - grained, very limy, gray to dark gray, ashy siltstone. Few very small spots tarry oil in more porous layers. Core moderately fractured with white and brown calcite veinlets from hairline to 198" wide, Dip 20 - Z50 , DRILLED 6858 - 6891 Thinly interbedded as ay siltstone and sandstone, dark Calcareous s`nale, bentonitic shale, and thin streaks of green ash. Litholog�37 - massive, hard, fine-grained, dark brownish -black, calcdweous s1.;aj1..e 5% - 85%; massive, fine to coarse-grained, silicious, 'Locally limy;, dark gray to gray brown, ashy siltstone and sandstone 10% - 50%; mass d -e to laminated, fine-gr.a,.ned, soft to hard, light to dark bluis:�- grav, bentonitic shah 10%; minor amounts - fine to coarse, gray to green, so t, ash; massi-;-e, fine-grained, brownish. - gray limestone; brown and white calcite fragments and veinlets, 6891- 6903 Predominantly _x,zrd., black, ca<<c�ar eous shale with thin interbeds of bentonitic shale and sxreaks of ashy sandstone and a5.0a. Litk.o%.ogy - massive, ''%ard,, fine-grained, brown- ish -black calcareous shale; massije to laminated, fine- grained, loyally asay., lig?it to dare 'ts,'.:xish-gra 1, bentonitic -66- 4 shale; hairline brown and white calcite veinlets. CORE 6903 - 6907 3' recovery. Entire core consists of: thinly laminated, soft to medium hard, fine to medium grained, well indurated, slightly limy, gray to pale bluish -gray, bentonitic ash. A few harder streaks which are strongly limy and possibly silicious. Occasional small specks of tarry oil scattered throughout the rock (may be carbona- ceous material trapped in situ). A few hairline fractures some of which are calcite -lined. Dip 20 - 250. DRILLED• 6907 - 6935 Interbedded dark calcareous shale, bentonitic ash, bento- nitic shale, ashy siltstone and sandstone, and limestone. Lithology - massive, fine-grained, hard, dark brownish - black, calcareous shale; massive to finely laminated, - medium hard, fine-grained, locally bentonitic, ash; finely laminated, soft fine-grained, light to dark bluish -gray bentonitic shale; massive, fine to coarse-grained, hard, - silicious, locally limy, gray, ashy siltstone and sandstone; thin streaks fine-grained, gray limestone; brown and white calcite fragments. CORE 6935 - 6938 31 recovery. Entire core consists of: Thinly bedded to thinly laminated, soft to medium hard, fine-grained, locally ashy, light to dark bluish to greenish -gray with - thin brownish laminae, bentonitic shale. Core badly broken and contorted with many hairline to 1/8" white calcite veinlets. Dip unobtainable. DRILLED + 6938 - 6967 Interbedded - massive to finely laminated, soft to 1 medium hard, fine-grained, locally ashy, light to dark bluish -gray, bentonitic shale 10 - 50%; massive to laminated, fine-grained, hard, silicious, locally limy, gray, ashy siltstone and ash 30-80%; massive, hard, fine-grained, dark brownish -black, calcareous shale 5 - 3016; minor thin streaks - coarse, soft, gray to green ash; fine-grained, brownish - gray limestone; brown and white calcite fragments. 6967 - 6971 31 recovery. Entire core consists of: massive, locally -67- faintly laminated, soft to medium hard, light to dark gray -brown, locally calcareous shale. Small inclusions of crystalline brown calcite. Core broken by numerous hairline fractures, some of which are lined with calcite. Dip 30°, DRILLED 6971- 7000 Interbedded - massive; fine to locally cherty, medium hard to hard, light brownish -gray to black, non -calcareous to calcareous shale 20 - 85%; massive, fine-grained, medium hard, gray to gray -brown limestone 0 - 50%; massive to finely laminated, soft to medium hard, fine-grained, light to dark bluish -gray, bentonitic shale 5 - 30%; thin streaks - fine to coarse-grained, laminated, gray to bright green ash; calcite veinlets; spots of tarry oil in fractures. 7000 - 7012 Interbedded light brown to black shale; cherty ash and bento- nite with thin streaks of sandy ash. Lithology - massive, fine-grained with a cherty appearance, hard, pale bluish - greenish -gray silicious, slightly limy ash, 0 - 80%; massive, fine-grained, hard, light brown to black non - calcareous to calcareous shale 10 - 60%; massive to finely laminated, soft, light bluish -gray, bentonitic shale 0 - 2076; thin streaks coarse, gray, sandy ash; coars.,,. soft, green ash; pyrite; calcite veinlets. CORE 7012 - 7014 1-1/2° recovery. Entire core: massive, coarse-grained, soft to medium hard, silicious, locally limy, mottled dark greenish -gray to gray, ash. Greenish material consists of sub -angular fragments embedded in a finer gray matrix. Core contains a small shear zone and a few hairline calcite - lined fractures. Dip unobtainable. DRILLED 7014 - 7045 Predominantly coarse, gray, limy and sandy ash with interbeds of light brown to black shale; bentonitic shale, and green ash. Lithology - massive, medium to coarse- grained, soft to medium hard, silicious (locally contains glass), limy to very limy, light to dark gray to brownish - gray, sandy ash to ashy limestone; massive, fine-grained, hard, light brown to black, non -calcareous to calcareous shale; laminated, fine-grained, soft, light to dark bluish - gray, bentonitic shale; fine to coarse-grained, soft, light to dark green ash; calcite veinlets; spots tarry oil. -68- ft 7045 - 7082 Interbedded - light brownish -gray shale; black calcareous shale; bentonitic shale; thin streaks coarse, gray to green ash. Lithology - massive, partially laminated, medium hard, fine-grained, light brownish -gray (mouse -colored), non -calcareous shale to impure limestone 15 - 80%; massive, hard, black, fine-grained, calcareous shale 20 - 70%; massive to finely laminated, fine-grained, soft, light to dark bluish -gray, bentonitic shale 5 - 30%; massive to finely laminated, coarse-grained, gray, gray -brown, green; locally limy and silicious, ash; few calcite veinlets and spots tarry oil. CORE 7082 - 7086 3° recovery. First 4" - massive, to finely laminated, fine-grained, soft dark bluish -gray, bentonitic shale. Next V - massive to poorly laminated (shows cross bedding and unconsolidated deformation), medium grained, mottled pale bluish -gray to dark gray -brown, locally ashy - limestone. (Old fractures lined with blue -gray bentonitic material or gouge). Minor dead oil in fractures and in rock itself. Remainder of core - massive, fine-grained, hard, dark brownish -black, calcareous shale with scattered inclusions of pyrite. Few hairline calcite veinlets containing a little tarry oil. Dip 20 - 2509 DRILLED 7086 - 7130 Predominantly hard, black calcareous shale with thin streaks of coarse, gray to green ash. Lithology - massive, very fine to fine-grained, hard, dark brownish - black very calcareous shale (some of this formation might be called black limestone); laminated, medium to coarse- grained, soft, locally limy, gray, gray -brown to green ash; laminated, fine-grained, soft, bluish -gray, bentonitic shale; calcite veinlets. 7130 - 7170 Interbedded: black calcareous shale; light gray -brown non - calcareous shale; coarse, gray ash; coarse gray -brown ash; thin streaks bentonitic shale and coarse, green ash. Lithology - massive, hard, fine-grained, brownish -black, calcareous shale; massive, fine-grained, medium hard, light gray -browny non -calcareous to slightly calcareous shale; massive to laminated, coarse-grained, silicious (glass), limy, light gray, sandy ash; massive to laminated, coarse-grained, medium hard, silicious, limy, light brown., sandy ash; minor amounts: fine, blue -gray; bento- nitic shale; coarse-grained, locally limy, green ash; calcite veinlets. CORE 7170 No recovery. DRILLED 7170 - 7211 7170 - 7175 - predominantly coarse, gray to brownish - gray, sandy ash; 7175 - 7185 - predominantly gray, ashy siltstone; 7185 - 7207 - predominantly coarse, dark gray, sandy ash; 7207 - 7211 - predominantly hard black calcare- ous shale; thin streaks of bentonite and shale scattered through all ash members. Lithology - massive, medium to coarse-grained, medium hard, silicious (glass), quartz- itic texture, light to dark gray to brownish -gray, locally limy, sandy ash to ashy sandstone; massive, fine-grained, locally chert -like with conchoidal fracture, hard, dark gray, bluish to brownish -gray, ashy siltstone; massive, fine-grained, hard, dark brownish -black calcareous shale; laminated, fine-grained, light to dark bluish -gray, bentonitic shale; scattered calcite fragments with spots of tarry oil. 7211 - 7238 7211 - 7225 Interbedded hard, black calcareous shale; hard, light buff, calcareous shale; gray, limy ash; with thin streaks blue -gray bentonite; 7225 - 7232 predominantly hard, silicious, gray ash; 7232 - 7238 hard, dark, brown- ish-black, calcareous shale. Lithology - massive, fine- grained, hard, dark brownish -black, calcareous shale; massive, fine-grained, hard, light buff, calcareous to non -calcareous shale; massive to laminated, medium to coarse-grained, hard, silicious, locally limy, gray to brownish -gray, ash; laminated, fine-grained, soft, light to dark bluish -gray, bentonitic shale; calcite veinlets. CORE 7238 Made no hole. DRILLED 7238 - 7270 Interbedded hard, black, calcareous shale; gray -brown, non -calcareous shale; light gray -brown impure limestone; thin streaks medium -grained, gray ash; blue -gray, bento- nitic shale. Lithology - massive, fine-grained focally conchoidal fracture and chert -like), hard, dark brownish - black, calcareous shale; massive, fine-grained, hard, gray -brown, non -calcareous shale; massive, fine-grained, hard, light gray -brown, impure limestone; laminated, -rery fine-grained, soft, bluish -gray, bentonitic shale; massive -70- to laminated, medium -grained, silicious, gray ash; calcite veinlets. 7270 - 7297 7270 - 7280 predominantly hard, gray -brown, calcare- ous shale to impure limestone; 7280 - 7290 predomi- nantly coarse, gray to gray -brown, limy ash with occasional streaks bentonite and black shale; 7290 - 7297 interbedded gray, limy ash; black calcareous shale; bluish -gray bentonite; fine to coarse, green ash; calcite veinlets. Lithology - massive, fine-grained, hard, gray -brown to brownish -gray, calcareous shale to impure limestone; massive, medium to coarse- grained, soft, silicious, very limy, gray to brownish - gray, ash to ashy limestone. CORE 7297 - 7300 3° recovery. Entire core - massive to poorly bedded with occasional paper -thin lamin ae of coarse, gray ash, hard, fine-grained, dark brownish -black, calcareous shale. Moderate fracturing with fractures lined by calcite and containing traces of tarry oil. Dip 300. DRILLED 7300 - 7348 7300 - 7340 almost entirely massive, fine-grained, medium hard, dark brownish -black„ calcareous shale with. occa- sional thin interbeds of laminated, soft, blue -gray, bento- nitic shale and fine to coarse, silicious gray ash; hairline calcite veinlets. 7340 - 7348 interbedded dark brownish - black calcareous shale; massive to laminated, fine to coarse, light to dark gray to buff, silicious, locally limy ash; laminated, very fine-grained, soft, light to dark bluish -gray, bentonitic shale; calcite veinlets. CORE 7348 - 7350 2` recovery. Entire core - massive, fine-grained, medium hard, dark brownish -black, calcareous shale. Moderate fracturing with several long vertical, calcite -lined fractures. Dip unobtainable. DRILLED 7350 7375 Predominantly medium to hard, dark brownish -black cal- careous shale with interbeds of bentonitic shale and gray to green ash. Lithology - massive, medium hard to extremely hard, fine to very fine-gra_:ned, locally cherty, dark brownish -black, calcareoi:s shale; laminated; -71- fine-grained, light to dark bluish -gray, bentonitic shale; massive to laminated, fine to coarse-grained, gray, gray -brown, green, silicious, locally limy ash; minor amounts gray -brown chert; hairline to 1/8" wide calcite veinlets. 7375 - 7408 Interbedded - hard, brownish -black, calcareous shale; hard gray -brown impure limestone; streaks dark gray - brown, coarse, ash and blue -gray, fine-grained, bento- nitic shale. Lithology - massive, fine-grained, hard, locally cherty, dark brownish -black, calcareous shale; massive, medium hard, dark brownish -gray, impure limestone; massive to laminated, dark gray -brown, coarse-grained, silicious, locally limy, sandy ash; minor coarse-grained, gray to green ash; calcite veinlets. CORE 7408 - 7410 1-1/2' recovery. Entire core - massive, fine-grained, dark brownish -black, very calcareous shale. Thin streaks massive, gray -brown, fine-grained, impure limestone; paper -thin laminae fine-grained, gray ash, and dark bluish -gray bentonite. Formation moderately fractured by vertical, thin, calcite -lined cracks; traces of dead oil. Dip 30 350. DRILLED 7410 - 7440 Interbedded - hard, black, calcareous shale and medium hard, gray -brown, calcareous shale to impure limestone with thin streaks blue -gray, bentonitic shale and fine to coarse, gray to green, ash; calcite veinlets. Lithology - massive, hard, fine-grained; dark brownish -black, cal- careous shale; massive, fine-grained, medium hard, earthy to lustrous, light to dark gray -brown, calcareous shale to impure limestone; fine to coarse-grained, sili- cious, limy, gray, sandy ash; fine, sea -green ash. 7440 - 7458 Predominantly coarse, mottled gray to gray brown, sandy ash or tuff with thin streaks of blue -gray, bentonitic shale; hard, brownish -black, calcareous shale and fine to coarse, gray to green, silicious, limy ash; calcite veinlets. Lithology - massive, coarse-grained, silicious (glass), limy, mottled, gray to gray -brown, soft, sandy, ash, or tuff. CORE 7458 - 7460 2' recovery. Top l`8" - massive, very coarse (;almost a fine conglomerate, well cemented and apparently -72- impermeable; mottled, light to dark gray to gray -brown, tuff or tuffaceous sandstone. Subangular grains, with average diameter of 1/16" and range from silt -size to 1/211, consist mainly of fine-grained ash and glass with minor amounts of black shale fragments. The rock is cemented by dark gray -brown, calcareous material, which is locally recrystallized. No sign of oil and no fractures. Sharp contact with underlying black shale. Bottom 4" - massive, fine-grained, hard, gray -brown to brownish -black, calcareous shale. Few thin calcite - lined fractures. No bedding planes but contact between tuff and shale has a dip of 250. DRILLED' 7460 7489 Interbedded - coarse, mottled gray to gray -brown, silicious limy, sandy tuff; massive, fine-grained, medium hard, gray, to gray -brown impure limestone; massive to finely laminated, soft to very hard, locally cherty, ashy, bentonitic shale; thin streaks hard, brownish -black, calcareous shale; coarse to fine- grained, gray to sea -green, ash; massive, very hard, gray -brown to bluish chert; calcite veinlets. 7489 - 7505 Interbedded - coarse, gray -brown, ash and hard, brovTn- ish-black calcareous shale, with thin streaks blue -gray, bentonitic shale; coarse-grained, gray to green, limy ash; minor amounts gray- bro x-ri chert; calcite veinlets. Lithology - massive, coarse-grained, medium hard, silicious, limy, gray -brown ash; massive, fine-grained, hard, calcareous shale to impure limestone, 7505 - 7540 Predominantly massive, fine-grained, hard, dark gray to brownish -black, very calcareous shale to impure limestone; with thin streaks fine, laminated, blue -gray, bentonitic, shale; and fine to coarse, gray to green, locally limy ash; calcite veinlets. 7540 - 7557 Interbedded - hard, brownish -black calcareous shale and gray -brown, locally ashy limestone to 1, -,my ash; thin streaks blue -gray, bentonitic shale and fine to coarse, gray to green, ash; calcite veinlets. Lithology - massive, fine-grained, hard, dark brownish -black, calcareous shale; massive, fine to medium -grained, rich gray -brown, locally ashy, limestone to limy ash. CORE 7557 - 7559. �No recovery with exception of one small marble of bard, dark brownish -black, calcareous shale. -73- DRILLED 7559 - 7587 Predominantly hard, fine-grained, dark brownish -black, calcareous shale and fine-grained, hard, gray -brown impure limestone with thin streaks laminated, fine- grained, light to dark bluish -gray, bentonitic shale and fine to coarse-grained; gray to green, silicious, locally limy, ash; calcite veinlets fairly abundant. Formation from 7584 - 7587 was exceedingly hard and resembled a dark brownish -black slate. CORE 7587 - 7588 No recovery with the exception of two small pieces of. extremely hard, fine-grained, dense, non -calcareous, dark brownish -black slate. T)RTT,T.F.T) - 7588 - 7596 Interbedded - very fine-grained, brownish -black slate; hard, fine-grained, dark brownish -black, calcareous shale; fine-grained, gray -brown to buff, locally ashy, - impure limestone; thin streaks laminated, fine-grained, light to dark bluish -gray, bentonitic shale and fine to coarse-grained, laminated, gray to green, locally limy - ash; hairline calcite veinlets. Drilling c eased 10 a. m. Marcy. 3, 1940. -9 - RECONNAISSANCE GEOLOGY AND PETROLEUM POSSIRIL.ITIES OF THE ALASKA PENINSULA BY C. GARDLEY MOON AND 8,ERNOI-D M. HANSON ASSISTED BY EDWARD J. WEBBCR SUPERVISED BY RICHARD 0, HOLT JANUARY 1956 HUMBLE 0�4- & PFFINING Ct-MFANv EXPLORATION DEPARTMENT t '' �= ki.. + "• ' '�* X5.1 � .,. ,.a •+r T. ,. x , t. r Al Ix '`�'• a 9 r f.r� tt�v • •! 4ti '�`t. F r, � t � } i ; l ' i1� r� - �1 i ♦ r � f IQ .' 4 'A . r r rd I i' .' ' i 1 s ,, . r, { ,'•� , �« a,`e,:1 '1 `� U`' •.%t. 1 {F• .. 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APPENDIX TO GEOLOGIC STUDIES IN SOUTHEASTERN AND SOUTHWESTERN ALASKA BY THE 1956 HUMBLE FIELD PARTY January 1957 Humble Oil & Refining Company Exploration Department ,?tl r�r F'Tj-IIi_�• S_I1rr Jr NeI6rtr at�yJrIsIt cIIII �JhJiJtIa� Jsb-K_-�y`rltr r1I Well lr1 1e_lJ l C1�IJ.:RJ_ArI.MI M'ER#1 Search by API API 50129100060000 1IT0rr� 01..-JJ,'.,•r3,M . 9. .0 II J J ••.tRJm- .FErri-T,,-"�a r Cr lr1 IOr�3JI tr IIi1 .fn. g I_ -E , JJ pJJ 3J;D,rl;_ 7I 5 Operator STANDARD OIL CO OF CALIFORNIA -rmit Detp 7/17/1938 Iating Datum Well Name GRAMMI P&A 'vation 347 Basin Name ALASKA PENIN SE Spud Datc' 7/17/1938 t a I Dept; 75976 Lease Completion Date 310/4Total Vertical C 0 Field/Pool Name Initial/Final Class EXP/EXP Meridian --- Lat:Long --- Section:Township:Range --- Footage to NIS and E/W Line eward --- 57.601346368364:-155.929613981074 --- 10:30S:41W --- 1320=>S 1320=>W 155.9296139810eward --- 57.6013463684 - 74 --- 10:30S:41W 1320=>S 1320=>VN Processed Materials and Data Reports Available TYPE Print Page tbi FORAMINIFERA 50129100060000 7 Print oDetails t Screen I j ! I-J_ ++c.7:!i: ' nr.r r, rII - : : !, r r'. r�rl f �•IF - - r - c - ,, Lf!, �1a - d 11:' ar � r• TABLE OF CONTENTS Page Final Geologic Report on the Standard Oil Company of California, Tide Water Associated Oil Company, and Union Oil Company of California Well Grammer No. 1 R. L. Hewitt . . . . . . . . . . 1 Megafossils and Spores and Pollen from Puale Bay, Alinchak Bay, and Cape Kekurnoi, Alaska Stuart A. Levinson . . . . . . . 75 Megafossils from Becharof Lake, Puale Bay, and Katmai, Alaska Stuart A. Levinson . . . . . 86 Petrographic Descriptions of Miscellaneous Samples from Alaska John J. W. Rogers . . . . . . . 93 A Dacite-Porphyry Pebble in Tuxedni Formation (Middle Jurassic) from Kamishak Bay, Alaska Stuart A. Levinson . . . . . . . 155 Porosity, Permeability, and API Gravity of Samples from Alaska Humble Service Laboratory Ralph K. Hill . . . . . . . . . . 155 Petrography of Cores from the Standard of California et al No. 1 Grammer, Bear Creek - Salmon Creek Anticline, Alaska Peninsula P. H. Masson . . . . . . . . . 157 -I- ].c-apEm lO:jangS LOCATION CLEARANCE REPORT State of Alaska OIL AND GAS CONSERVATION COMMISSION PTD N.o. ~) .-- / ~ ~ Memorandum To File: API No. / Z9 - /oo0¢ Spud: -///7/~9, , Note casing size, wt, depth, cmt vol, & procedure. Sfc Csg: ~ O.~d Long Csg: ~0 . . Liner: Perf intervals - tops: Review the well file, and comment on plugging, well head status, and location clearance - provide loc. clear, code. Well head cut off: Marker post or plate: Location Clearance: ConclusiOns .', ~6t~_/~+ ~. m~ ~ ~ ' Code F ~' Signed Topogra,o;.uc Map Opeiator *Standard Oil of Calif well Name Crammer No. 1 Other Major Interest Holdem ~,~ Tidewater and Union of Calif. Wildcat._._ Development _ Location Sud. Approx 600'N, ZOS0'W of SE cot. Sec. 10: TJOS, B. 41W, SM Btm. (If Directional) ,.~::-ula A7 iviap' aefcrence so. AP I 50-129-10006 Date Spud 7 / 17 /3 8 ...-mpleted Abandoned 3/3/40 Suspended Total Depth 7, 596' Redrtll Depth Vertical Depth Elevation Ground 34 77 Topo Kelly Bushing Drilling Contractor Rig Make Mud Logging Company Size Casing Record [ "P~rf. Intervals "D~'~th t' 'Sx.I ' Production (If Ap,plicab.le) ....... Pay Interval None. P ar A with oil residue. Shows of Oil and Gas. Initial Potential Choke(s) Tp Cp G. mvity Gas Production . i Remarl~ - Geol0gic To~ - E'~c. 0[l residue. Shows of !oil and gas. Sample record made but almost illegible. Forma tion record avail, from Pet. Pub. Salmon Creek, Bear Creek-Sa.lmon Creek Anti- cline area. Penetrated Upper Jurassic Sh.elikof fro., Middle Jurassic Kilalagvik fro., Lower Jurassic (?), Triassic (?). PETROLEUM PUBLICATIONS, INC. Electric - Mud Log(s) Intervals ..... D~ill Stem Tests P. o. POX aaT~ ANGHORAGE, AL.AGKA Core Intervals ., COtYklGHI' Standard Oil. ComP~n.y.. ~ell No. Grammer - i L6ca~i'o'n':' Sec." 10, T. 30 S., R. 41 W., Seward Meridian Elevation: 347 feet Commenced drilling- July 17, 1938 Finished drilling - March 3, 1940 From To 0 85 85 153 153 · 325 325 386 386 424 424 427 427 433 433 517 517 528 528 534 534 lO79 1079 1109 1109 1167 1167 1386 1386 1454 1454 1461 1471 1482 1461 1596 Formation Record ~ i i ill i i ill Il Sandy gray shale, blue clay and gravel Hard fine sandy blue shale, gray siltstone Medium soft bluish gray bentonitic shale, gray sand, hard light brownish gray limy shale, streaks of medium grained rusty gray sand. Hit flowing salt water at about 153 feet. Blusih gray bentonitic shale, gray sand, limy ~' streaks. Light brown and bluish.gray shale, limy spots, gray sand partings. Brownish gray clay shale, thin laminae gray silt, thin streak gilsonite. Good 30-32° dips. ~ Lost. No recovery. Brownish gray clay shale, few thin silty streaks. Soft gray brown clay shale, blue clay shale, light gray silt, few chert pebbles, some carbonaceous material. Single Belemnite at 518'. Good ll° dips to 519'; flat dips below. Slight slicken- siding at 519'. Lost. Norecovery. GAS showing at 529' -salt water? Soft gray clay shale, brownish shale, light gray sand. GAS showin5 on ditch. Tough gray shale (Drilling on iron). Grayish brow~ silty shale, some calcite veins. Dips from 16-25v. Core dr6pped from barrel and sequence lost. Bluish gray sand at 1094'. Good consistent 25° dips. Sour odor. Thin brown silty shale, light gray streaks that appear to be decomposed ash. GAS bubbles when removed from barrel. Consistent good 25° dips. ThSught to be Upper Kialagdik. Some fracturing at 1159' with fractures filled with calcite. Dip 23°· Drilled: Gray brown and hard brown shale. Gray silty, ash. Scattered carbonaceou~ plant fragments. Few Brachlopods. GoodS-6 dips. Single Ammonite Hammetoceras Howelli. (white). Drilled: Hard brown shale. Hard tough brown shale, decomposed ash or impure bentonit%. All drill~ same. Gray brown shale, blue shale spotted with ash. Decomposed ash or impuEe bentonite. Irregular dips varying from 5-11-. Some calcite filled fractures. Fresh core showed GAS in fractures and in laminae. Drilled: Hard tough brown shale. . Grammer Well No. 1 From To 1596 1695 1778 18oo 1944 2018 2105 2132 2140 2243 2317 2354. 2428 2520 2526 2598 26O9 2656 Formation Record -- - -- : jllllll i i , i ,,1 1695 Badly fractured brown shale with limy streaks, decomposed ash. 5° dips. Core shows 75°. Cal- cite fractures. Some GAS in fresh core. 1778 Hard gray brown shale. Calcite fractures. Hard limy streak. Drilled: hard brown shale with '':. bluish gray bentonitic shale. 1800 Laminated compact gray brown and bentonitic shale. Good 9° dips. 1944 Drilled: Hard brown shale, bentonitic shale. Regu- lar bedding with only minor calcite veins. Good 9-11° dips. Very hard medium grained dark gray sand with oil residue or gilsonite that causes e ditch samples to give lighter amber cut with aotone. 2018 Hard gray brown sale with streaks of light gray bentonitic shale. 2105 Laminated hard gray brown and bentonitic shale. Dip 5-½°. 2132 Fractured brown shale with bentonite. Drusy calcite fractures. Slight trace of free light oil. Core too badly broken up to determine dip. Minor faulting evident. Abundant ammonites. Dips good; varied from 26° to 17°. 2140 Compact gray brown shale with impure bentonite. Ammonites,.. Single Pecten? Dips uniform at 15°. No showings",' . ..... ' 2243 Drill~d~l .hard'gray brown shale..- Godd 15o .dips. S. ight light...bil shbwing in fractures. Bluish gray limestone. Dips 14-15o. Some dry oil residue. Some calcite veining. Consistent 10o dips. Trace dead oil on fracture faces~ 2317 Hard gray brown shale, bluish gray ~mpuEe bentonite. some calcite veining. Dips 10-13v, 7v. Trace of dead oil in fractures. Brown calcareous shale. Flat dip. Drilled: very hard brown shale. 235~ Massive very hard limy brown shale and siliceous shale. Driled: hard brown shale, impure bentonite. 2428 Hard gray brown shale with impure bentonite. Thin calcite veining. Dip 2-3o. Drilled: hard brown shale with impure bentonite. 2520 Hard dark gray brown shale, limy spots with minor calcite veining. Flat dip. Drilled: Hard brown gray shale, think streak impure blue gray bentonite. 2526 Drilled: Hard brown shale, bentonitic clay. Tarry oil on fracture planes. Veins calcite. Pecten, Ammonita fragment; Inoceramus? 2598 Interbedded hard silty brown sable with bentonitic clay. 2609 Hard gra~'brown fractured shale with bentonitic clay. Calcite eins. Tarry oil. ~ome carbonaceous mate, rial. Few Pelecypods. Coarse* Dip 0-3o. 2656 Drilled: Hard brown shale, ben~~g~y~and' 2668 Hard fradured shale. Calcite stringers and veins. Few calcareous streaks. Carbonaceous material. Fractured Tarry oil residue. Limy greenish sandm stone. Pelecypods. Ammonite. Dip 0-3o. -2- Grammer Well From ,, ~ 2668 2740 2822 2833 2936 2987 3083 3138 3147 3172 3176 3195 3212 To Formation Recorm~ Il I Il I Ii J -- 2740 Hard brown fractured shale, silty and calcareous streaks. Bentonitic clay. Ashy fine sandstone. Calcareous sandstone on top. Tarry oil residue. Carbon materials. Ammonite. Pelecypods. DEp 1°. 2822 Hard gray brown shale, streaks blue gray bentonitic clay. Calcite veins. Tarry oil residue. Ammo- nites at 2820'. 2833 Hard medium to course calcareous gray sandstone with vertical fract~es.* No oil in sandstone. Carbonaceous material. Few Ammonite fragments. 2936 Hard gray brown shale, thin streaks blue gray bento- nitic clay. Calcite fractures. Tarry oil residue. Thin streaks gray sandy ash. Carbonaceous material. Flat dips. 2987 Hard gray brown shale, thin streaks blue gray bento- nitic clay. Calcite veins. Tarry oil residue. Medium ashy sandstone, irregularly oil stained. Carbonaceous material. 3083 Gray brown and dark brown shale, bentonitic clay. 3138 Very hard gray brown silty shale. Calcareous streaks. Vertical calcite fractures. Tarry oil residue. Few laminae blue gray bentonitic clay and medium brown sand. Carbonaceous material. Dip 0°. 3147 Interbedd~d very hard dark brown shale and very hard medium gra~ sandstone. Tarry oil residue. Pyrite. Vein~ hard carbon mat6rial. Bento~itic shale~.0il stained sandstone. 0ight oil odor, Pale yellow ether cut. Drilled: Hard gray brown shale. Very hard greenish gray fine sandstone. No oil. Laminae gray brown shale and blue gray bentonitic clay. Coarse gray brown to blue gray ashy medium sand- stone. Vertical fractures. Calcite. No oil stain in sandstone. Impure gray bentonite on bottom. 3172 Thinly laminated hard gray to dark gray ashy fine to medium sandstone, tarry oil residue. No stain in sandstones. Hard blue gray b~ntonitic shale on top. Hard coarse ashy brown quartzite with pyrite. Hard medium to coarse silty blue-gray ash to ashy light brown limestone. 3176 Hard coarse mottled white to blue gray ashy quartzite Scattered oil stains. Fair yellow ether cut. Tarry oil in fractures. 3195 Firm limy gray ash, Spots and specks pure white ash. Irregularly spotted with oil stain. Few large calcite filled fractures with some tarry oil resi-- due.~ Light brown limestone. Very faint oil odor. Very pale straw yellow ether cut. Hard massive blue-gray fractured coarse silty ash. Quartzitic in places. Dip 0°. 3212 Hard gray brown to silty medium to coarse ash. Blue fine grained chert. Numerous calcite filled fractures, some showing barry oil residue. Ash sparsely spotted with oil. Faint heavy oil odor. Straw yellow ether cut. Limestone. Dip 0-3°. 3215 Firm to hard massive coarse blue gray silt to limy ash. Bentonitic. Calcite fractures, some tarry oil residue. Ash oil stained. Top-oil stained black. ~. ~ ~ ....... ~Calcite-fill~d/~Tarry oii ~eSidue -3- in D;ractures. Grammer Well . 1 From To Formation Record 3215 3224 3236 3250 3270 3285 3290 3305 3321 3330 3332 3342 3378 3383 3399 3401 3420 3462 3224 Firm to hard massive mottled brown limy ash to ashy limestone. Few laminae blue-gray ash. Tarry oil. Faint oil odor. Straw yellow ether cut. Color of ash believed ~ue to oil stain. 3236 Firm blue gray to white ash; chert and limy; calcite fractures,some tarry oil. IrregUlarly oil stained. F~w uniformly oil stained streaks. Hard ashy blue bentonite on bottom. 3250 Firm blue-green ash. Spots oil stain; cherty ash. Calcite fractures, same how little heavy oil. Slight suplhurous odor. Buff limestone. Dip 0-2°. 3270 Blue-green fractured ash. Spots oil stain. Hard fine quartzitic badly fractured sandstone. Calcite. Some heavy oil. Dip 0-3°. Hard brown sandstone. Straw yellow ether cut. Tarry oil residue. Brown sandstone, bentonite. 3285 Brown silty shale, gray brown sandstone, brown to black fine sandstone. Thin slaty streaks. Thin laminae green sand. 3290 Drilled: Hard gray brown silty shale; fine brown sandstone streaks. 3305 Fine brown sandstone. Greenish gray medium to coarse sandstone, white ash spots, dark gray sandstone. 3309 Hard coarse white sandstone, dark gray brown silt- stone streaks. 3321 Massive silty brown sandstone, silty brown shale streaks. 3330 Silty to Calcareous dark brown shale, brown sand- stone streaks. 3332 Hard fine to medium sandstone, limy streaks. 3342 Hard gray medium to coarse sandy ash. 3378 Mottled gray and white sandy ash. High angle frac- tures, dry oil stains scattered. Sour odor. Cherty spots. Calcite veins, tarry oil residue. Faint heavy oil odor. Few inclusimons.brown shale. Drilled: hard mottled gray and white medium sandy ash. 3383 Massive gray and white medium ashy sandstone. 3399 Gray and white medium ashy quartzitic sandstone; dark brown slatY shale to cherty quartzite. 3401 Very hard brown slaty shale to fine quartzite; cherty inclusions, bentonitic ash, gremn fine slate at top. Pyrite. 3420 Drilled: very hard brown and green slaty shale to quartzite. Fine to medium calcareous sandstone. Bentonitic shale. Large open calcite faced fractures with tarry oil residue. ~ip 0-4°. Brown to black fine grained slate. Vertical fractures. Scattered pyrite. Dip 3-5°. 3462 Drilled: very hard dark gray slaty shale. Brown shale. Calcite veins. Brown calcareous shale. Tarry oil residue. Calcareous gray sandstone. Streaky~sandy dark gray blue lime. 3575 Drilled: Hard dark gray shale. Calcite veins. Calcareous streaks. Bentonitic shale, impure limestone. Some tarry oil residue. -4- Grammer Well No. 1 From To Formation Record 3575 3625 3643 3721 3783 4010 4163 4224 4280 4312 4548 4573 3625 Drilled: Hard dark gray brown calcareous shale, impure limestone, bentonitic shale. Calcite. Spotted tarry oil residue. Dark gray slickensided fractured bentonitic chale. 3643 Hard dark~gray calcareous shale. Calcite veins. Bentonitic shale streaks. 3721 Drilled: Hard dark gray brown calcareous shale, calcite fracture~, tarry oil residue. Calcite veins. 3783 Drilled: Hard dark gray brown shale, calcareous streaks, calcite veins. Bentonitic shale, cal- careous aandstone with scattered pyrite. T~ace carbonaceous material. Few small Pectens. Tarry oil residue. 4010 Drilled: Hard dark gray brown calcareous shale. Calcite veins. Decomposed medium blue gray ash. Sca ttered pyrite. Core brecciated in places. Small section near top fractures filled with ce- ment. Tarry oil residue. Interbedded calcareous shale and impure limestone. Bentonitic shale. Some carbonaceous~material. Dip 3-5°. Few poorly preserved bivalves. 4163 Drilled: Interbedded hard brown calcareous shale and impure limestone, bentonitic shale. Calcite. 4224 Hard gray brown fractured limestone, calcareous shale, bentonitic shale, medium gray ash.. Calcite fractures, tarry oil residue. Dip 5°. Drilled: Interbedded calcareous shale and impure limestone. Horizontal and vertical calcite filled fractures. Rare Pelecypods. Dip 0-3°. 4280 Interbedded hard, dark brown calcareous shale and gray brown limestone. Few Laminae blue gray bentonitic shale and medium ash. Calcite; tarry oil residue. Abundant small Pelecypods and Pectens. Dip 0-3°. Drilled: calcareous shale and limestone. Some volcanic glass. 4312 Drilled: interbedded hard dark gray brown calcareous shale and gray brown limestone. Streaks of green gray bentonite, and gray ash. Calcite; little tarry oil residue. 4548 Interbedded hard dark gray brown limestone, coarse crystalline brown limestone and calcareous shale. Calcareous gray ash. Bentonitic shale,. Vertical calcite fractures, showing tarry oil residus Dip 0-5°. ' 4573 Interbedded soft dark to light bluish gray bentonitic shale. Gray fine impure limestone. Coarse blue ash, coarse pebbly ashy limestone,ohard black calcareous shale' Calcite. Dip 5 Plus-minus. Gray brown shale and limestone. 4635 Interbedded hard brown calcareous shale, brown shale, brown limestone, gray bentonitic shale. Streaks greenish gray limestone, fine to coarse gray ash. Calcite veins. -5- From To Formation Record 4635 4672 4788 4838 4843 4851 5097 5160 5224 5263 5280 4672 Interbedded massive to thinly laminated gray brown ashy shale, calcareous shale, bentonitic shale, cherty dark brown shale. Streaks light gray brown limestone. Few calcite fractures. Drilled: as above. Gray ash. 4788 Interbedded hard gray ahale, bentonitic shale, light gray impure limestone. Streaks medium and coarse gray ash. Calcite veins. Cherty shale, slightly calcareous shale. 4838 Drilled: Interbedded hard blue gray calcareous ashy bentonitic siltstone, gray brown shale and blue gray bentonitic shale. Calcite fractures. Tarry oil residue. Fine and coarse gray ash and lSt gray limestone. 4.843 Fairly hard fine to coarse micaceous calcareous ashy sandstone and sandy ash. Dip 0°. Interbedded hard dark blue gray bentonitic and brown shale. Find calcite veins. Brittle greenish gray bentonitic shale. 4851 Drilled: Interbedded hard gray brown shale and blue gray bentonitic shale. Thin light gray limestone streaks. Calcite veins. 5097 Hard gray brown shale and brownish black calcareous shale; streaks blue gray bentonitic shale. Fine and coarse gray ash. Gray brown limestone and limy gray ash. Calcite veins. Cherty dark gray brown shale. Dark gray to dark greenish gray be~tonitic shale, streaks Siltstone and ash. ~Drilled. as above 5160 Drilled: Interbedded hard dark gray brown calcareous shale; fine to medium light and dark gray ash, blue gray bentonitic shale. Thin streaks gray limestone. Calcite veins. Massive firm bluish gray medium ash and bentonitic ash. Tarry oil residue. Few spots and very thin streaks coarse gray limestone. Dip 20-40o? 5224 Firm gray fine bentonitic ash. Brownish black shale; Bentonitic shale and gray limestone. Calcite veins. Interbedded hard gray brown calcareous shale, medium light and dark gray^ash~ Pale greenish gray limestone. Dip 20-30u. Tarry oil residue. 5263 Hard very finely laminated gray ashy sandstone and sandy bentonitic ash. Inclusions gray limestone. Calcite fractures, tarry oil residue. Drilled: gray bentonitic ash and bentonitic shale, streaks gray medium ash, brownish black cherty ahale and gray limy sandstone. Calcite veins. 5280 Interbedded hard brownish black locally calcareous shale; ashy blue gray bentonitic shale and fine to medium gray ash. Thin greenish gray limestone. Calcite vein. 5346 Interbedded hard brownish black locally calcareous shale; ashy ~lue gray bentonite and bentonitic shale and medium gray ash. Thin streaksbrown shale and blue limestone. Calcite veins. Streaks gray and brown limestone. Tarry oil residue. Dip 25° . Calcite inclusinns and slickensiding. Grammer Well No. 1 From To 5346 5418 5660 5685 58O2 5806 5859 586o 5995 ~Formation Record 5418 Drilled: Interbedded ashy blue gray bentonite and bentonitic shale, fine to medium ash. Streaks brownish black shale. Calcite veins. Greenish gray ashy bentonite and bentonitic shale, cal- careous in streaks. Gray limestone streaks, gray brown limestone. 5660 Interbedded hard brownish black calcareous shale; gray brown limestone and blue gray bentonitic shale. Streaks light and dark medium ash. Cal- cite veins. Little tarry oil residue. Coarse ash, blue and greenish gray limestone. Drilled like hard shale. Very hard dark bluish to brown- ish gray calcareous shale. 5685 Hard interbedded dark blue gray sandy shale, gray brown cherty sandy shale, brownish gray limestone. Calcite veins. Dip 15-20°. Hard brownish gray calcareous shale, greenish gray sandy limestone. Dip 20-25°. Drilled like hard shale. Fine to medium gray ash, blue gray bentonitic shale. 5802 Interbedded hard thinly laminated gray brown impure limestone;brownish black slightly calcareous silty shale; coarse gray limy ashy sandstone; greenish gray bentonitic shale. Calcite fractures. Some tarry oil residue. Fine to medium light gray ash, streaks blue gray chert. 5806 Hard brownish to greenish gray laminated bentonitic shale; hard gray ashy'limestone; brecciated zone on bottom conisiting of greenish gray bentonitic shale and brownish black calcareous shale rece- mented with calcite and chert showing some tarry oil residue in fractures. Calcite filled fractures. Dip 15-40°. 5859 Drilled: Hard interbedded brownish black calcareous shale, gray limestone, sandy limestone; greenish gray bentonitic shale streaks, fine to medium ash. Calcite veins. Some brecciated material as in previous core. Hard thinly laminated ashy cal- careous sandstone. Some tarry oil residue. Dip 20-30°. Blue gray bentonitic shale streaks. 5860 Very hard brownish gray to dark brown thinly laminated calcareous quartzite to q~artzitic limestone. Calcite fracture. Dip 40v. 5995 Interbedded hard brownish black calcareous shale; gray brown and blue gray limestone, sandy gray limestone. Streaks blue gray bentonitic shale, fine to coarse gray ash. Calcite veins. Streak blue grey chert. Coarse gray limy sandstone. Impure limestone. One brecciated zone in which .gauge and shale fragments are recemented with cal cite. Some tarry o~l residue, oRare ~" laminae dark blue bentonite Dip 15-25 . 6012 Hard bluish gray lOcally calcareous bentonitic shale. Streaks dark gray limestone, brownish gray cal- careous ahale, blue gray bgntonitiC limestone or limy ash. Calcite veins. -7- Grammer Well N~ · 1 From To Formation Record 6012 6067 6067 6068 6069 6133 6137 6175 6228 6235 6277 6449 6460 Hard dark brownish gray to brownish black very calcareous shale to impure limestone. Streaks blue gray bentonitic sbAe. Numerous calcite fracU tures; sligh showing tarry oil residue. Dip 0-15 . Few thin streaks gray brown limestone, fine to coarse gray ash. Streak brownish gray coarse cal-- careous sandstone. 6068 Hard Brownish gray thinly laminated silty shale. 6069 Firm massive coarse gray ash. 6133 Hard massive brownish black calcareous shale. Blue gray bentonitic and ashy b~ntonitic shale. Entire core shows numerous calcite filled fractures and is faulted in several places. Dark shales are brecciated in manN' places. Some tarry oil residue. Thin streaks coarse gray ash. Calcite veins. Streaks coarse gray limy sandstone. Greenish gray tuffaceous lime- stone. Brownish gray limestone. 6137 Dip 10-20°? Hard greenish gray to gray brown locally calcareous bentonitic shale. Dark greenish gray limy spots. Hard gray brown shale. Laminae green fine ash. Greenish to gray brown locally calcareous ash. Hard gray brown calcareous silt- stone and ashy limestone. Entire core shows cal- cite fractures with some tarry oil residue along cracks. 6175 Drilled: interbedded hard gray brown limy shale to siltstone; gray brown limy ash, gray bentoniti¢ shal~, brownish black calcareous shale. Few thin streaks fine to coarse gray ash. Calcite veins. Impure limestone. One crack filled with pyrite or marcasite. Some tarry oil residue in fractures. 6228 Drilled: Hard dark gray brown calcareous shale. Few thin streaks bentonitic shale and fine to medium gray ash. Calcite veins. Impure limestone. 6235 Hard fine to coarse fractured greenish gray ashy sandstone to locally limy sandy ash. Gray brown limestone in middle of core. Dip indeterminent. 6277 Drilled: Interbedded hard brownish black calcareous shale to impure limestone, medium to coarse greenish gray sandy ash or tuffaceous sandstone. Few thin/ streaks blue gray bentonitic shale. Calcite veins. Dip 20-30°. Thin limy laminae. Coarse siliceous pyritized ash. Few thin fractures thruout core. No calcite. 6449 Drilled: Interbedded hard gray brown calcareous s~le , blue gray bentonitic shale~ Thin streaks ~ greenish gray fine to coarse ash. Calcite veins. Impure limestones drilled like hard shale. Locally limy ash. Hard brownish black calcareous shale. 6460 Hard gray to greenish gray locally sandy and limy ash and ashy limestone. Streaks brownish black cal- careous shale, blue gray bentonitic shale. Cal- cite veins. 6481 Hard brownish black calcareous shale. Streaks gray limestone, gray bentonitic shale, fine to coarse gray ash. Calcite veins. Medium to coarse gray locally limy ash, gray limestone. -8- Grammer Well No. 1 From To Formation Record 6481 ,6485 6505 6518 6530 6629 6640 6703 6762 6782 6485 Hard blue gray bentonitic shale, brown to gray limestone. Streaks fine to coarse gray ash. Calcite veins. 6505 Bri~tle greenish gray quartzitic locally limy ash. Streaks black shale, blue gray bentonitic shale. Calcite veins. Fine quartzitic sandstone. 6518 0verhole. Hard fine to coarse locally limy, siliceous, tuffaceous, pale green gray sandstone. 6530 Hard medium to coarse pale greenish gray locally calcareous, tuffaceous sandstone. Quartzitic in' places. Black cherty shale. No cut or odor. Drilled-hard black calcareous shale. Hard blue gray bentonitic locally ashy shale, blue gray cher- ty siliceous bentonitic ash. Brow n calcareous shale. 6629 Gray brown to brownish black calcareous shale. Lime- stone streaks. Calcite veins. Very thin bentoni- tic locally ashy and siliceous shale. Impure limestone. Dip 25-30°. 6640 Dip 25-40°. Hard light-and dark gray to greenish gray fine bentonitic ash or ashy siltstone. Fine fractures. Top 6 inches has a 1-inch fracture zone with rugs showing tarry oil residue. Gray to brownish gray siliceous ash. Calcareous inclusions Gray siliceous and limy fine to coarse ash. Blue gray bentonitic shale, brownish black calcareous shale. Calcite veins. 6703 Hard gray locally limy ashy bentonitic siltstone, breaks brownish black calcareous shale, blue gray bentonitic shale. Calcite veins. Fine to coarse well indurated ashy sandstone. Note: These formations are not £rue siltstones or sandstones because their composition is predomin- a'ntly ash, but have been described as such due to their probably sedimentary origin. Dip 25-30°. Locally limy, bentonitic ash to well cemented ashy siltstone. Rare minute specks tarry oil. No cuts or odor. Core shows fractures filled principally with brown and white calcite. Also noted were gray chalcedonic quartz and a dark brown siliceous mineral. Tarry oil residue. 6762 Drilled: hard gray medium to coarse siliceous locally limy ashy siltstone and sandstone. Calcite veins. Brownish black calcareous shale. Gray ash. Tarry oil residue. Dip 25°. Blue gray bentonitic shale. 6782 Hard gray to blue gray ashy bentonite to fine siliceous bentonitic ash. Streaks brownish black calcareous shale, medium to coarse gray ~iliceous and limy ashy sandstone. Calcite veins. 6788 Hard light greenish gray to brownish gray medium to coarse siliceous locally limy well cemented ashy sandstone. Rare minute specks tarry oil. Few calcite filled fractures. No cut or odor. -9- Grammer Well No. 1 From To Formation Record 6788 6832 6847 6858 6903 6907 6915 6935 6967 7006 7o45 7082 6832 Hard medium to coarse (quartzitic texture) well cemented brownish to gr°ay locally limy siliceous ashy sandstone. No cut or odor. Grayish green ash. Core showed few small fractures or joint planes. Dip 25°. Streaks blue gray bentonitic shale. Calcite veins. Limy ashy siltstone. 6847 Hard brownish black calcareous shale. Calcite veins. Gray limestone with inclusions of shale and ash. Some tarry oil. Dip 30v. Drilled: black calcare- ous shale, limy ashy aandstone, ashy siltstone. 6858 Interbedded fine to coarse siliceous locally limy gray ashy sandstone, ashy siltstone, brownish black calcareous shale. Thin streaks blue gray bentonit~ shale. Calcite veins. ~ew specks tarry oil residue 6903 Interbedded hard fine to coarse gray siliceous locally limy ashy sandsto~, ashy siltstone, browni~ black calcareous shale. Blue gray bentonitic shale. Calcite veins. 6907 Hard fine to medium (quartzitic texture)locally limy gray to blue gray bentonitic ash. Rare minute specks tarry oil residue. Few fracture, some calcite filled. No cut or oil odor. IIip 20-25°. 6915 Drilled: Interbedded hard medium to coarse siliceous locally limy gray ashy sandstone, fine to medium siliceous limy gray sandy ash or ashy siltstone. Calcite veins. 6935 Interbedded brownish black calcareous shale, blue gray bentonitic shale. Thin streaks ashy gray siltstone. Calcite veins. Very thin streaks gray limestone. 6967 Hard bluish gray to greenish gray ashy bentonitic shale. Badl~ broken and contorted in places with numerous calcite filled fractures. Interbedded bluish gray bentonitic shale, ashy gray limestone or limy ash. Calcite veins. Brownish black cal- careous shale, gray siliceous limy ashy siltstone. Thin streak~ coarse gray and green ash. 7006 Hard brownish gray slightly calcareous shale. Numerous fractures, calcite filled with little tar- ry oil residue. Dip 25-30°. Drilled: hard gray b~mwn to black non-calcareous to calcareous shale. Gray limestone streaks, gray bentonitic shale, coarse gray and green ash. Calcite veins. 7045 Hard fine siliceous locally limy bluish to greenish gray. ash. Streaks brown to black non-calcareous to calcareous shale. Calcite veins. Sheared in places. Very calcareous gray ash to ashy lime- stone, black calcareous shale, limy gray sandy ash. Streaks blue gray bentonitic shale. 7082 Interbedded hard brown ~hale, black calcareous shale, blue gray bentonitic shale, gray brown locally ashy limestone. Calcite veins. Impure limestone. 7083 Gray to dark gray brown locally ashylimestone with cracks filled with bentonite. Blue gray bento- nitic shale on top. -10- Grammer Well No. 1 From To Formation Record 7083 7135 Brownish black calcareous shale. Few hair line calcite filled fractures, some tarry oil residue. Dip 20-25°. Drilled same shale. Streaks coarse gray and greenish ash. 7135 7186 Interbedded hard gray brown locally limy shale, gray to brown coarse limy sandy ash. Streaks bluegray bentonitic shale. Calcite veins. Black calcareous shale, coarse gray and green ash. Ashy siltstone. 7186 7207 Hard coarse gray siliceous locally limy ash to sandy ash or ashy sandstone. Thin streaks black calcar- eous shale, blue gray bentonitic shale. Calcite veins. 7207 7286 Hard brownish black calcareous shale. Calcite veins. Streaks fine to coarse limy gray ash, blue gray bentonitic shale, gray brown shale, gray brown ashy limestone. Light ~ray brown locally ashy impure limestone. The log from 7286 feet to bottom~ 7596 feet, is taken from progress cables and may be subject to minor corrections when daily drilling reports are received through the mail. 7286 7445 7445 7483 7483 7583 7583 7596 Interbedded hard fine dark gray to gray brown cal- careous shale to impure limestone, medium to coarse gray to gray brown siliceous very limy ash to ashy limestone; thin streaks hard black calcareous shale, blue gray bentonite. Calcite veinlets. Predominantly hard dark brownish black calcareous shale below 7295' - 7373', few hairline fractures, traces tarry oil. Dip 30o. Some chert. Brownish gray impure limestone. Dip 30-35°. Interbedded hard gray brown medium to coarse siliceous limy ash to ashy siltstone; coarse gray to gray brown tuffaceous sandstone or brownish black calcareous shale, streaks blue gray and dark gray bentonitic shale. Calcite veinlets. Predominantly hard brownish black calcareous shale, with increasing amounts hard gray brown locally ashy limestone; streaks blue gray bentonite, fine to coarse gray to green ash. Calcite veinlets. Gray brown impure limestone. Hairline calcite veinlets plentiful. ~ Interbedded very hard black slate, hard brownish black calcareous shale and gray brown impure limestone, thin streaks blue gray bentonite, fine to coarse gray to green ash. Calcite veinlets. -11-