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Referred by: Blodgett, Robert B.
Report prepared by: Armstrong, Augustus K.
Date: 08/26/1980

U.S. Geological Survey, Branch of Paleontology and Stratigraphy, 345 Middlefield Road, MS 15, Menlo Park, California 94025

August 26, 1980

To: Mr. Robert B. Blodgett, Department of Geology, Oregon State University, Corvallis, Oregon 97331

Dear Mr. Blodgett:

I have examined your specimens, 79WG113, for microfossil and coral fragments. The limestone has been recrystallized and there are no algae or foraminifera. The corals are solitary forms and are not well preserved. They appear to be belong to the genus Faberophyllum sp. indet. They are of late Meramecian or earliest Chesterian, Mississippian age.

Under separate cover I am returning your specimens.

Sincerely,

Augustus K. Armstrong

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79WG113 , Mc Grath , Rocks at this locality are siliceous-cemented mudstone which is exposed as talus rubble. Locality coordinates: Lat. 62 deg. 05.4'N, Long. 155 deg. 11.3' W; NW1/4 NE1/4 NW1/4, sec. 17, T23N, R32W, McGrath A-5 quadrangle, 1:63,360 scale, 1954 edition. From interbedded fine-grained, siliceous-cemented, clastic rocks and limestones that form the uppermost beds within an unnamed argillite and chert unit, whose total thick probably exceeds 600 m (approx. 2,000 ft). Abundant bryozoans, brachiopods and pelecypods are also found at the same locality. (description from Hahn et al., 1985). [Dutro E&R report of 8/14/80 provides following description: Alaska, McGrath A-5 quad.; NW 1/4 NE 1/4 NW 1/4 sec. 17, T. 23 N., R. 32 W.; silicified limestone lens within uppermost part of unnamed chert-argillite unit. Collector: W. Gilbert, 1979.]
Faberophyllum sp. indet.