Report on Referred Fossils |
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| Stratigraphic range: |
Lower(?) and Middle Devonian |
| Kinds of fossils: |
Marine invertebrates |
| Quadrangle or area: |
Charley River and Eagle quads., Alaska |
| Shipment No.: |
A-60-28 |
| Referred by: |
Brabb, Earl E.
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| Report prepared by: |
Dutro, J. Thomas, Jr.
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| Date: |
05/19/1972 |
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This report on the non-coralline material from this old shipment confirms earlier suggestions about the age of these Devonian strata. The collections fall into three groups: 1) four collections from the McCann Hill along the Tatonduk River, 2) two collections from the Devonian limestone on the Nation River, and 3) two collections from the limestone in the Woodchopper Volcanics. Nothing in the collections of the first group is diagnostic, in my opinion, but the general aspect of the fauna looks more like late Emsian than younger. The two collections from the Nation River are probably of early Middle Devonian age. The collections from the Woodchopper Volcanics are also probably Middle Devonian, but they are different from those of the Nation River. This could reflect facies differences or the Woodchopper fossils could be from a younger Middle Devonian horizon. I favor the latter interpretation on the basis of the material in these collections.
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| User Note module to be added |
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60ABa 83
(6441-SD)
, Eagle
, Grayish-black, coarse-grained, cherty, fetid, massive limestone. The collecting area was mapped as alluvium by Mertie (1933, USGS Bull 836, pl. 7), but he reports (Ibid., p. 413, sample 28Mt 161, F and S no. 2063) a Middle Devonian fauna from a locality that plots very close to, if not at 60ABa 83. The fossils at 80ABa 83 include abundant rhynchonellid-like brachiopods, abundant Pelmatozoa columnals, and Favositid-like corals or bryozoa. They were collected along the north bank of the Tatonduk River, approx. 15.5 miles NNE of Eagle, Alaska. coords. (22.2, 18.0).
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echinoderm debris, indet.
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Platyceras (Orthonychia) sp.
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loxonematid gastropod, indet.
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orthoconic cephalopod, indet.
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odontopleurid trilobite (Leonaspis?)
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60ABa 84B
(6442-SD)
, Eagle
, North bank of Tatonduk River, 4,000 feet (river distance) upstream from mouth of Funnel Creek, 600 feet downstream from 60ABa 83, and more or less at the same stratigraphic horizon as 60ABa 83. Fauna and lithology similar to those of 60ABa 83 except that 60ABa 84B also has stromatoporoids.
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echinoderm debris, indet.
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minute trilobite pygidium, indet.
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60ABa 192
(6443-SD)
, Charley River
, Lithology and fauna similar to those at 60ABa 83 and 60ABa 84B. Localities 60ABa 192, 60ABa 83 and 60ABa 84B are along strike and probably at approx. the same stratigraphic horizon. The beds at 60ABa 192 were mapped by Mertie (USGS Bull 836, pl. 7) as "Middle Devonian Limestone, shale, and chert". Mertie considered this unit slightly younger than the Salmontrout limestone. Charley River A-1 Quad. Along Funnel Creek about 1,200 feet (airline distance) upstream from mouth.
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echinoderm debris, indet. (includes 2-hole columnals)
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fenestrate bryozoans, indet.
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60ABa 632
(6445-SD)
, Charley River
, Grayish-black, fine- to coarse-grained limestone. Contains abundant and well-preserved fossils, including crinoid stems as large as 3/4" dia. atrypid brachiopods, bryozoa, favositid-like corals, and a gastropod. Charley River B-2 Quad.; west bank of Nation River, approx. 1.8 miles (airline) downstream from mouth of Hard Luck Creek.
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echinoderm debris and large columnals, indet.
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fenestrate bryozoan fragments, indet.
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medium-spired gastropod, indet.
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60ABa 1063
(6446-SD)
, Charley River
, Grayish-black, fine- to coarse-grained, fetid limestone. Contains abundant fossils including brachiopods, bryozoa or corals, and Pelmatozoa columnals. Mapped as Woodchopper volcanics (Middle Devonian) by Mertie (see USGS Bull 616, p. 78-60). Charley River B-5 quad.; north bank Yukon River opposite Woodchopper Roadhouse.(from original E&R report); [Dover & Miyaoka, 1988 has no locality description given, shown as locality 35 on map, lat./long based on digitization of map location: 65º21'54" N, 143º18'47". Collection from collections of Earl Brabb. Kept in the U.S. National Museum (Smithsonian Institution), Washington, D.C.
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echinoderm debris, indet.
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Plethorhyncha? sp. (may be undetermined uncinuloid)
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60ABa 1064
(6447-SD)
, Charley River
, Dark-gray, fine-grained limestone with brachiopods, Pelmatozoa columnals, bryozoa, and favositid-like corals. Mapped as Woodchopper volcanics (M. Dev.) by Mertie. Charley River B-5 quad.; south bank Yukon River, approx. 3.7 miles downstream from Woodchopper Roadhouse. [Shown as locality 36 on Sheet 2 of Dover & Miyaoka, 1988, but no locality description given. Collection kept in U.S. National Museum (Natural History), Smithsonian Institution, Washington, D.C. Collections of E.E. Brabb.]
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echinoderm debris, indet.
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fenestrate bryozoans, indet.
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trilobite pygidia, undet.
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60ABa 631
, Charley River
, Grayish-black, fine-grained, dense limestone with brachiopods. Underlies a shale unit that may be correlative with Lower(?) Miss. rocks of Mertie (USGS Bull. 836, p. 416-420). Charley River B-2 quad.; coords. (10.3, 2.3); west bank of Nation River, approx. 1.6 miles (airline) downstream from mouth of Hard Luck Creek.
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fenestrate bryozoan fragment
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60ABa 211
, Charley River
, Grayish-black, coarse-grained limestone similar to that at 60ABa 192. Probably same unit and same age (Middle Devonian). Contains abundant Pelmatozoa columnals and a few brachiopods. Charley River A-1 Quad.; coords. (13.6, 0.7); along Funnel Creek, approx. 2,000 feet (airline distance) upstream from mouth.
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echinoderm debris, indet. (includes 2-hole columnals)
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brachiopod fragments, indet.
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smooth ostracodes, indet.
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