Sample: |
Sample No. 75AMu57 -- USGS No. Mesozoic locs. D11071, D11072, D11073, D11074, D11075, D11076, D11077, D11078, D11079, D11080, D11081, D11082, D11083, D11084, D11085, D11086, D11087, D11088, D11089, D11090, D11091, D11092, D11093, D11094, D11095, D11096, D11097, D11098, D11099, D11100, D11101, D11102, D11103, D11104, D11105, D11106
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Locality: |
Field No. 75AMu57
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Description: |
Section located on bluff on east bank of Otuk Creek; sec. 31, T. 10 S., R. 16 W. |
Location: |
Alaska Quadrangle: Killik River C-5 Township&Range: T10S R16W Section: Sec.31 |
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Reference
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Title: |
Report on Referred Fossils
,
1980
(04/01)
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This report is concerned with 36 samples from different footages within the section selected as the type for the upper part of the Otuk Formation, a new name being proposed for the "Shublik Formation" in the overthrust sequences of the Brooks Range. Section located on bluff on east bank of Otuk Creek; sec. 31, T. 10 S., R. 16 W. Field no. 75AMu57. |
Report by: |
Norman J. Silberling
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Referred by: |
C. G. Mull
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| Age: | Late Triassic |
Formation: | Otuk Formation |
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Comment: | The collections marked with an * are the most age diagnostic for use in correlating this section. |
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Title: |
The Late Triassic Bivalve Monotis in Accreted Terranes of Alaska
,
1997
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ABSTRACT--Late Triassic bivalves of the genus Monotis occur in at least 16 of the lithotectonic terranes and subterranes that together comprise narly all of Alaska, and they also occur in the Upper Yukon region of Alaska where Triassic strata are regarded as representing non-accretionary North America. On the basis of collections made thus far, 14 kinds of Monotis that differ at the species or subspecies level can be recognized from Alaska. These are grouped into the subgenera Monotis (Monotis), M. (Pacimonotis), M. (Entomonotis), and M. Eomonotis. In places, Monotis shells of one kind or another occur in rock-forming abundance. On the basis of superpositional data from Alaska, as well as from elsewhere in North America and Far Eastern Russia, at least four distinct biostratigraphical levels can be discriminated utilizing Monotis species. Different species of M. (Eomonotis) characterizes two middle Norian leves, both probably within the upper middle Norian Columbianus Ammonite Zone. |
Report by: |
Norman J. Silberling
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J. A. Grant-Mackie
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K. M. Nichols
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| Age: | Norian |
Formation: | Otuk Formation |
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Comment: | [Silberling et al., 1997, p. 19 provides following description: Killik River region, northern Alaska; type section of Otuk Formation on bluff on east bank of Otuk Creek, D11071, 144 feet above base...Coll: C.G. Mull, 1975, field No. 75AMu57. Killik River 1:250,000 quadrangle (sec. 31, T. 10 S., R. 16 W.). [Endicott Mountains subterrane of the Arctic Alaska terrane]] |
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