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Home My WebLink AboutGMC Data Report No. 0475Mo32 (REV, 5-78) Shell Oil Company Interoffice Memorandum APRIL 30, 1982 SUBJECT: MICROPALEONTOLOGY REPORT AMOCO CATHEDRAL RIVER UNIT #1 ALASKA PENINSULA, ALASKA The AMOCO Cathedral River Unit #1 well ditch cuttings and core material were sampled at the Alaska Oil and Gas Conservation Commission, (ditch cuttings composited into 90-foot samples) and prepared in our laboratory for microfossil analysis. Attached is a list of all intervals sampled and examined -- 159 ditch and 5 core samples. In most cases there are two samples to each prepared slide. An analysis of the microfossil content shows the following general results: 50-6170' Upper Jurassic. Foraminiferal genera present include: Bathysiphon, Ammobaculites, Spiroplectammina, Haplophragmoides, Trochammina, Gaudryina, Recurvoides, Lenticulina, Astacolus, Dentalina, Eoguttulina, Conorboides. Both nassellarian and spumellarian radiolarians are present with spumellarians dominant in numbers. 6170- 14,360' Probably Middle Jurassic. Foraminiferal genera present in addition to those listed above include: Ammodiscus, Verneuilinoides, Textularia, Nodosaria, Lin. gulina, Marginulinopsis. Nassellarian and spumellarian radiolarians are present in most samples and abundances of both kinds are very high in many samples. Inoceramus fragments are present through most of this interval. Four core samples between 7405 and 7425 feet were essentially barren of organic material. One core sample at 12,100-12,110 feet contained rare arenaceous foraminifers, some nassellarian radiolarians, and fragments of Inoceramus. Abundant pyritic fragments present may represent remains of spumel larlan radiolarians. Samples Prepared For Foraminiferal AMOCO Cathedral River Unit Examination #1 Well on the Ditch Samples 50- 140 140- 230 230- 320 320- 410 410- 500 500- 590 590- 680 680- 770 770- 860 860- 950 950-1040 1040-1130 1130-1220 1220-1310 1310-1400 1400-1490 1490-1580 1580-1670 1670-1760 1760-1850 1850-1940 1940-2030 2030-2120 2120-2210 2210-2300 2300-2390 2390-2480 2480-2570 2570-2660 2660-2750 2750-2840 2840-2930 2930-3020 3020-3110 Ditch Samples 3110-3200 3200-3290 3290-3380 3380-3470 3470-3560 3560-3650 3650-3740 3740-3830 3830-3920 3920-4010 4010-4100 4100-4190 4190-4280 4280-4370 4370-4460 4460-4550 4550-4640 4640-4730 4730-4820 4820-4910 4910-5000 5000-5090 5090-5180 5180-5270 5270-5360 5360-5450 5450-5540 5540-5630 5630-5720 5720-5810 5810-5900 5900-5990 5990-6080 6080-6170 Ditch Samples 6170-6260 6260-6350 6350-6440 6440-6530 6530-6620 6620-6710 6710-6800 6800-6890 6890-6980 6980-7070 7070-7160 7160-7250 7250-7340 7340-7430 7430-7520 7520-7610 7610-7700 7700-7790 7790-7880 7880-7970 7970-8060 8060-8150 8150-8240 8240-8330 8330-8420 8420-8510 8510-8600 8600-8690 8690-8780 8780-8870 8870-8960 8960-9050 9050-9140 9140-9230 Samples Prepared For Foraminiferal AMOCO Cathedral River Unit Examination #1 Wel 1 on the Ditch Samples 9230-9320 9320-9410 9410-9500 9500-9590 9590-9680 9680-9770 9770-9860 9860-9950 9950-10,040 10,040-10,130 10,130-10,220 10,220-10,310 10,310-10,400 10,400-10,490 10,490-10,580 10,580-10,670 10,670-10,760 10,760-10,850 10,850-10,940 10,940-11,030 11,030-11,120 11,120-11,210 11,210-11,300 11,300-11,390 11,390-11,480 11,480-11,570 11,570-11,660 11,660-11,750 11,750-11,840 11,840-11,930 11,930-12,020 12,020-12,110 12,110-12,200 Ditch Samples 12,200-12,290 12,290-12,380 12,380-12,470 12,470-12,560 12,560-12,650 12,650-12,740 12,740-12,830 12,830-12,920 12,920-13,010 13,010-13,100 13,100-13,190 13,190-13,280 13,280-13,370 13,370-13,460 13,460-13,550 13,550-13,640 13,640-14,730 13,730-13,820 13,820-13,910 13,910-14,000 14,000-14,090 14,090-14,180 14,180-14,270 14,270-14,360 Core Samples 7405-7410 7410-7415 7415-7420 7420-7425 12,100-12,110 SBM:tat cc: S.B. I. P. Paleo Mulvane Rao Files For: T. ~o'ok, Manager Stratigraphic Services