Reference Detail of

Report on Referred Fossils
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Stratigraphic range: Middle and Upper Devonian
Kinds of fossils: Corals
Quadrangle or area: McGrath A-5 quadrangle
Shipment No.: O-80-15
Referred by: Blodgett, Robert B.
Report prepared by: Oliver, William A., Jr.
Date: 04/14/1980

The following lists are my identifications of the corals in your collections sent with covering letter dated December 5, 1979. USGS locality numbers are assigned for our records; this will not interfere with the assignment of USNM locality numbers at a later date. It will help, however, if you inform the USNM catalogers that these USGS numbers were assigned for the corresponding coral assemablages.

Ages are in accordance with your statement of probable ages. 79RB16 is Frasnian by all of our usual criteria and the others are most likely Middle Devonian although late Early Devonian cannot be ruled out in all cases.

If 79RB4, 8, 9, and 12 are all the same age, Eifelian (approximately Hume equivalent) seems most likely.

If you have age data from other sources, especially conodonts will appreciate having this information.

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79RB4 (10060-SD) , Mc Grath , Long. 155 deg. 07'05"W., Lat. 62 deg. 04'03"N. NE1/4, SW1/4, NW1/4, SE1/4 sec. 22, T23N, R32W. Silicified fossils recovered from talus of limestone scree slope on west side of southeastward flowing stream in section 22. (description from Rigby and Blodgett, 1983, p. 774)
Syringopora sp.
Cystiphylloides sp. cf. C. macrocystis of McLean
Cystiphylloides sp.
79RB8 (10061-SD) , Mc Grath , Long. 155 deg. 09'23"W, Lat. 62 deg. 04'33"N. NE1/4, NW 1/4, NE1/4, NW1/4 sec. 21, T23N, R32W. Approximately 3.0 m (10 ft) thick silicified fossil horizon, the top of which is 101.5 m (333 ft) below the top of the Cheeneetnuk Limestone. (description from Rigby and Blodgett, 1983, p. 774)
Acanthophyllum? sp.
Cyathophylloides sp.
Dendrostella? sp.
Disphyllum? sp.
Lekanophyllum sp. 2
Neostringophyllum 2 spp.
79RB9 (10062-SD) , Mc Grath , Long. 155 deg. 09'23"W, Lat. 62 deg. 04'33"N. NE1/4, NW1/4, NE1/4, NW1/4 sec. 21, T23N, R32W. Silicified fossil horizon, approximately 3.0 m (10 ft) thick, the top of which is 81.7 m (268 m) below the top of the Cheeneetnuk Limestone. (description from Rigby and Blodgett, 1983, p. 774)
Acanthophyllum? sp.
Cystimorph
Dendrostella? sp.
79RB12 (10063-SD) , Mc Grath , Long. 155 deg. 07'27"W., Lat. 62 deg. 05'15"N. SE1/4,SW1/4,NE1/4,NW1/4, sec. 15, T23N, R32W, McGrath A-5 quadrangle. Rubble crop of silicified fossils just above a band of prominent white dolomite on the south side of an east-dipping slope. (description from Poncet and Blodgett, 1987, p. 1270-1271)
Acanthophyllum? sp.
Dohmophyllum sp.
Neostringophyllum a
Neostringophyllum b
Cystiphylloides sp.
Lekanophyllum sp. cf. L. mediale McLean
Lekanophyllum sp. 2
Microplasma sp.
Zonophyllum sp.
New genus? cf. Spinolasma
Cyathophyllum sp.
Sociophyllum? sp.
Auloporoid sp. cf. Remesia
Alveolitid (ramose)
79RB16 (10064-SD) , Mc Grath , Long. 155 deg. 03.2 min W., Lat. 62 deg. 02.9 N. Coral(s) found in talus, derived from overlying limestone cliffs, which consitute the base of limestone unit of probable Frasnian age (This unit is at least several hundred feet thick, probably much more). [description from Oliver E&R report of 4/4/1980]
Disphyllum? 2 spp.
Macgeea sp.
Tabulophyllum sp.
T. sp.