Reference Detail of

Report on Referred Fossils
Edit Reference Add/Edit Sample Sample List Show Map

Stratigraphic range: Permian
Kinds of fossils: Brachiopods
Quadrangle or area: Eagle D-3 Quad. (Yokon-Tanana Upland), Alaska
Shipment No.: A-74-5
Referred by: Foster, Helen L.
Report prepared by: Dutro, J. Thomas, Jr.
Date: 04/02/1974

Both collections in this shipment contain brachiopods characteristic of Permian rocks in eastern Alaska. 73AFr112 (=72AFr445 – USGS 24951-PC) adds to the short list of forms, reported in 1972, and makes the correlation with the Tahkandit Limestone more secure. 73AFr122B, while containing only poorly preserved material, substantiates the mapped correlation of the quartzite between the two localities.

Both collections are clearly Permian, probably correlated to the sandstone unit of the Tahkandit Limestone of the Nation River area.


***
Brief statement of problem and remarks (from collector):
These are additional fossils collected from the same locality as 72AFr445 (USGS 24951-PC) reported on by Dutro 10/18/72. Additional material was collected because of the significance of this locality as the first documented occurrence of Permian in the Eastern Yukon-Tanana Upland south of the Tintina fault zone.

User Note module to be added
73AFr112 (23598-PC) , Eagle , Alaska, Yukon-Tanana Upland, Eagle D-3 Quad.; T. 1 N., R. 28 E.; 64 deg. 55 min. 43 sec. N. Lat.; 143 deg. 04 min. 42 sec. W. Long.; zone of rubble and broken gray fine-grained quartzite, about 200 ft. wide, on narrow wooded ridge. Collector: H. L. Foster, 1973. (description from Dutro E&R report) [Dusel-Bacon and Harris, 2003, provide following description: Eagle D-3 quadrangle, lat 64 deg. 55'45"., long. 142 deg. 04'31" W. Collected by H.L. Foster in 1973 and identified by J.T. Dutro, Jr.]
orthotetid, indet. (large finely costellate fragment)
Megousia sp.
Waagenoconcha? sp.
Anemonaria? sp.
Thamnosia? sp. (poorly preserved)
Neospirifer sp.
Spiriferella sp.
pectenid pelecypod, undet. fragment
73AFr122B (23599-PC) , Eagle , Alaska, Yukon-Tanana Upland, Eagle D-3 Quad.; T. 1 N., R. 28 E.; 64 deg. 55 min. 46 sec. N. Lat.; 142 deg. 05 min. 46 sec. W. Long.; gray quartzite about 1 mile west of brachiopod locality 73AFr112, apparently same bed. Collector: H. L. Foster, 1973. (description from Dutro E&R report)[Dusel-Bacon and Harris, 2003, p. 13 provide following description: Eagle D-3 quadrangle, lat. 64 deg. 55'46" N., long 142 deg. 06'40" W. Collected by H.L. Foster in 1973 and identified by J.T. Dutro, Jr.]
Chonetinella? sp.
Yakovlevia sp.
productoid, indet.
Spiriferella sp.
Neospirifer? sp.
punctate spiriferoid, indet.