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Sample No. No Data
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Field No. No Data
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| Description: |
Richfield Oil Co. - Wide Bay test well No. 1, core 5 at depth of 2235-2236 ft. on north side of Wide Bay, Alaska. (description from Imlay E&R report of 12/23/76); Richfield Oil Co. Wide Bay test well 1, core 5 at depth of 2,235 to 2,236 feet, on north side of Wide Bay, Alaska Peninsula. Waehneroceras. (description from Imlay and Detterman, 1973, p. 22)
*Well Section - |
| Location: |
Alaska Quadrangle: Ugashik B-2 Township&Range: T35S R44W Section: SW1/4NE1/4NW1/4 sec. 5 |
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Reference
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| Title: |
Report on Referred Fossils
,
1976
(12/23)
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Enclosed are lists of Lower Jurassic ammonite genera and species present at Wide Bay, Puale Bay and Alinchak Bay on the Alaska Peninsula and near Seldovia on the Kenai Peninsula. All known ammonite localities of age significance are listed under the stages Hettangian, Sinemurian, and Toarcian. In northwest Europe Psiloceras is characteristic of the lower, Waehneroceras of the middle, and Schlothemia of the upper Hettangian. At Puale Bay the genus Schlotheimia is represented by only one specimen that is preserved in a reddish brown matrix. Associated fossils (Mesozoic loc. 10820) are preserved in a gray matrix and are represented mostly by the genus Paracaloceras which current studies show that Schlotheimia was collected from a different bed or unit than the other ammonites, and that its stratigraphic position and faunal characteristics need checking. Mesozoic loc. 10820, according to Capps (Bull. 739, p. 94), is 1 1/3 miles northwest of the mouth of Puale Bay in the lower part of a sequence of pebbly sandstone that contains many grains of red jasper and greenstone and large fragments of carbonaceous shale. If the distance of 1 1/3 miles is correct it should be at the same position as ROC locs. 1240 and 1241. It could, however, be as much as 240-280 feet higher in the lower part of a sequence of massive tuffaceous sandstone. The genus Arnioceras at Puale Bay occurs in the upper part of the tuffaceous sandstone well above the beds containing Paracaloceras. I will attempt to locate these fossil localities on the map and section prepared by Kellum et al (1944) and then send copies to you for final checking before we see the sequence again next summer. |
| Report by: |
Ralph W. Imlay
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| Referred by: |
Robert L. Detterman
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| | Age: | Hettangian |
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| Comment: | Age: Hettangian Note by R.B. Blodgett: detailed locality information derived from American Stratigraphic Co. log and Detterman (1990, USGS Open-File Report 90-279) |
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| Title: |
Jurassic Paleobiogeography of Alaska
,
1973
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ABSTRACT: Jurassic marginal seas occupied considerable areas in southern and northern Alaska and in the western part of the Kuskokwim region of southwestern Alaska. They appear to have been absent during late Callovian time, much restricted during Hettangian, Bathonian, early Oxfordian and late Tithonian time, and most extensive during Sinemurian, Bajocian, and late Oxfordian to middle Tithonian time. A large area in central Alaska was probably never covered. A southwestern prolongation of that area from the Talkeetna Mountains westward to the western end of the Alaska Penin- sula was the site of granitic intrusions during late Early Jurassic time and of extensive erosion during Middle and Late Jurassic time. Variations in the rate of uplift of the area of these granitic intrusive rocks may explain why marine transgressions and regressions were at different times in southern than in northern Alaska during the Bajocian and Bathonian. Connection of the northern and southern marginal seas occurred through Yukon Territory and eastern- most Alaska. The Jurassic ammonite succession in Alaska is similar to that in central and northern Europe and northern Asia. In Lower Jurassic beds, it is essentially identical. In Bajocian and in Oxfordian to lower Kimmeridgian beds, the ammonite succession in Alaska differs from that in the other areas mainly by the presence of some genera found only in areas bordering the Pacific Ocean and by the absence of a few genera common in central and northern Europe. In con- trast, the Bathonian rocks of Alaska contain ammonites, such as Arcticoceras, Arctocephalites, and Cranocephalites, that are widespread in the Arctic region but are unknown in central Europe. Comparisons with the Tithonian of Europe are not possible because ammonites of that age, other than Lytoceras and Phylloceras, are not yet known from Alaska. The Alaskan Jurassic ammonites of late Pliensbachian Age and of Bathonian to early Kimmeridgian Age belong mostly to the Boreal realm and have very little in common with Tethyan realm ammonites such as those found in areas bordering the Mediterranean Sea. |
| Report by: |
Ralph W. Imlay
,
Robert L. Detterman
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| | Age: | Hettangian |
| Formation: | Unknown (Unknown (not given)) |
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| Comment: | Age: Hettangianm Generalized location shown as locality 15 in figure 2 |
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Well Section
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