Report on Referred Fossils |
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| Stratigraphic range: |
Permian |
| Kinds of fossils: |
Brachiopods |
| Quadrangle or area: |
Juneau D-5 quad., Alaska |
| Shipment No.: |
A-84-40 |
| Referred by: |
Karl, Susan M.
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Brew, David A.
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| Report prepared by: |
Dutro, J. Thomas, Jr.
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| Date: |
10/12/1984 |
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One collection in this shipment contains silicified brachiopods of Permian age, like those from the Pybus Formation elsewhere in southeastern Alaska. The critical form is Septacamera stupenda Grant, a large, multicostate rhynchonelloid described by Grant from the Pybus (1971). I have previously considered the Pybus to be of "middle" Permian age, recognizing that its faunas are roughly ccorrelated to the Word of Texas. Conodonts recently identified from the Pybus by Bruce Wardlaw (report to Brew, 5/8/84, shipment A-83-30) suggest an early Late Permian age. This age is based on a new boundary proposal which places the Lower/Upper Permian boundary within the Word Formation of west Texas. At any rate, this collection fits a pattern of Pybus-like limestones throughout southeastern Alaska.
REFERENCE
Grant, R.E., 1971, Taxonomy and Autoecology of Two Arctic Permian Rhynchonelloid Brachiopods: Smithsonian Contrib. Paleobiology, No. 3, p. 313-335.
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| User Note module to be added |
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84SK412B
(29346-PC)
, Juneau
, Juneau D-5 quad.; sec. 14, T. 36 S., R. 60 E.; 58 deg. 45 min., 16 sec. N.; 135 deg. 21 min. 18 sec. W.; SW side of ridge, 2 mi. S. of Endicott River, 2 mi. W. of triang. station William Henry; dark gray, fossiliferous, massive limestone. Collector: S.M. Karl, 1984. Collection retained.
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coarsely silicified, indeterminate echinodermal debris
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Septacamera stupenda Grant
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