Report on Referred Fossils |
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Stratigraphic range: |
Lower Permian |
Kinds of fossils: |
Brachiopods, mainly |
Quadrangle or area: |
Chandler Lake, Killik river, Philip Smith Mtns. and Wiseman quads. |
Shipment No.: |
A-83-43a |
Referred by: |
Mull, C. G.
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Report prepared by: |
Dutro, J. Thomas, Jr.
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Date: |
02/14/1984 |
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This is the first of several reports on this large shipmnet of 55 collections. Because first priority was set by the transmittor for the collections from the Siksikpuk Formation and related beds, this report covers 15 collection from those rocks. Five of these collections contain almost identical faunas and probably represent the same key shell bed in the Cobblestone Creek-Atigun Gorge area (field numbers 83AMu77-2, 86; 83ASK447, 470, 504). All these collections contain elements of the fauna, known for more than 30 years from this formation, that is considered of early Permian age. The fauna contains relatively few taxa, probably the most prevasive being the smooth-shelled brachiopod MARTINIA which occurs abundantly in shelly accumulations, in some places. Another characteristic form is the small gastropod STRAPAROLLUS (EUOMPHALUS) ALASKENSIS Yochelson and Dutro. Also included in this assemblage are ATTENUATELLA, ANIDANTHUS and SPIRIFERELLA. Occasionally, small horn corals are found including UFIMIA, SOCHKINEOPHYLLUM and TACHYLASMA (Rowett, 1975). Faunas similar to these were reported from the Jungle Creek Fm. in the Yukon by Bamber and Waterhouse (1971) where they were referred to as Fauna E (various zones) of Asselian through Sakmarian age. The Siksikpuk fauna also contains elements of the faunas reported in Asselian and Sakmarian strata in northeast USSR (Zavodovskiy et al, 1970). REFERENCES Bamber, E.W., and Waterhouse, J.B., 1971, Carboniferous and Permian stratigraphy and paleontology, northern Yukon Territory, Canada: Bull. Canadian Petroleum Geology, vol. 19, no. 1, p. 29-250. Rowett, C.L., 1975, Stratigraphic distribution of Permian corals in Alaska: U.S. Geol. Survey Prof. Paper 823-D, p. 59-75. Yochelson, E.L., and Dutro, J.T., Jr., 1960, Late Paleozoic Gastropoda from northern Alaska: U.S. Geological Survey Prof. Paper 334-D, p. 111-147. Zavokovskiy, V.M., et al., 1970, Field Atlas--Permian faunas and floras of northeastern SSSR: Magadan, 407 p.
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User Note module to be added |
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82AMu72-2
(29151-PC)
, Chandler Lake
, Alaska, northern; SE Chandler Lake quad.; T. 12 S., R. 7 E.; 68 deg. 23.78' N., 150 deg. 25.65' W.; West fork of Peregrine Creek; gray silty limestone of Siksikpuk Fm. Collector: G. Mull, 1982. Collections retained.
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echinoderm debris, indet.
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pelecypod fragments, indet.
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82AMu77-2
(29152-PC)
, Philip Smith Mts
, Alaska, northern; Philip Smith Mtns. quad.; T. 11 S., R. 12 E.; 68 deg. 27.58' N., 149 deg. 16.2' W.; Atigun gorge; shale of Siksikpuk Fm. Collector: G. Mull, 1982.
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several shells of a large species of Martinia
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a few scraps of probable Spiriferella
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83AMu86
(29153-PC)
, Chandler Lake
, Alaska, northern; SE Chandler Lake quad.; T. 12 S., R. 8 E.; 68 deg. 23.28' N., 150 deg. 17.45' W.; Cobblestone Creek; gray siltstone and silty limestone of Siksikpuk Fm. Collector: G. Mull, 1983.
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large number of shells of the large form of Martinia
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83ASk236
(29154-PC)
, Chandler Lake
, Alaska, northern; Chandler Lake quad.; T. 13 S.; R. 1 E.; 68 deg. 17.9' N., 151 deg. 54.8' W.; Skimo Creek; siltstone of Siksikpuk Fm. Collector: J. Siok, 1983.
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indeterminate brachiopod fragments
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83ASk241
(29155-PC)
, Chandler Lake
, Alaska, northern; Chandler Lake quad.; T. 13 S., R. 1 E.; 68 deg. 17.9' N., 151 deg. 54.8' W.; East Skimo Creek; silty limestone of Siksikpuk Fm. Collector: J. Siok, 1983.
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echinoderm debris, indet.
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small horn corals, indet.
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linoproductid brachiopod, indet.
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Straparollus (Euomphalus) alaskensis Yochelson and Dutro
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coiled cephalopod?, indet.
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83ASk253
(29156-PC)
, Chandler Lake
, Alaska, northern; Chandler Lake quad.; T. 13 S., R. 1 E.; 68 deg. 17.9' N., 151 deg. 54.8' W.; Skimo Creek; concretions from Siksikpuk Fm. Collector: J. Siok, 1983.
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indeterminate small brachiopods
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83ASk295A
(29157-PC)
, Killik River
, Alaska, northern; south-central Killik River quad.; T. 11 S., R. 11 W.; 68 deg. 29.79' N., 154 deg. 27.1' W.; Wolf Creek?; gray clay zone in Siksikpuk Fm. Collector: J. Siok, 1983.
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fragments of a linguloid phosphatic brachiopod
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83ASK425
(29158-PC)
, Chandler Lake
, Alaska, northern; Chandler Lake quad.; T. 13 S., R. 1 E.; 68 deg. 18.7' N., 151 deg. 48.5' W.; East Fork of Tiglukpuk Creek; gray silty limestone of Siksikpuk Fm. Collector: J. Siok, 1983.
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echinoderm debris, indet.
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Straparollus (Euomphalus) alaskensis Yochelson and Dutro
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83ASk428
(29159-PC)
, Chandler Lake
, Alaska, northern; same locality as 83ASk425. Collector: J. Siok, 1983.
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a few fragments of Martinia sp.
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possible cephalopod mold, indeterminate
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83ASk445
(29160-PC)
, Chandler Lake
, Alaska, northern; same locality as 83ASk241. Collector: J. Siok, 1983.
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indeterminate phosphatic fish fragments (bones and teeth?)
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83ASk447
(29161-PC)
, Chandler Lake
, Alaska, northern; Chandler Lake quad.; T. 12 S., R. 7 E.; 68 deg. 24.3' N., 150 deg. 20.0' W.; Cobblestone Creek; gray limestone of Siksikpuk Fm. Collector: J. Siok, 1983.
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Orulgania? sp. (large spiriferid)
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83ASk470
(29162-PC)
, Chandler Lake
, Alaska, northern; Chandler Lake quad.; T. 12 S., R. 8 E.; 68 deg. 24' N., 150 deg. 16.2' W.; Cobblestone Creek; gray limestone of Siksikpuk Fm. Collector: J. Siok, 1983.
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Martinia sp. (large) - abundant
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83ASk504
(29163-PC)
, Philip Smith Mts
, Alaska, northern; Philip Smith Mtns. quad.; T. 11 S., R. 12 E.; 68 deg. 27.58' N., 149 deg. 16.2' W.; Atigun gorge, gray limestone of Siksikpuk Fm. Collector: J. Siok, 1983.
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83AMu75
(29164-PC)
, Wiseman
, Alaska, northern Wiseman quaed.; sec. 29, T. 36 N., R. 13 W.; 67 deg. 56.3' N., 150 deg. 26.0' W.; Amauk Creek, Doonerak area; red-brown calc. limestone and sandstone, Sadlerochit Fm.? Collector: G. Mull, 1983.
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Straparollus (Euomphalus)? sp.
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orthocone cephalopod fragment, indet.
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worm burrows (bioturbated)
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83AMu82-1
(29165-PC)
, Wiseman
, Alaska, northern; Wiseman quad., sec. 18, T. 36 N., R. 13 W.; 67 deg. 55.2' N., 150 deg. 31.3' W.; Wien Mtn.; Sadlerochit Fm.? Collector: G. Mull, 1983.
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Spiriferella? sp. (small)
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