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The biostratigraphy and paleoecology of the Gerster limestone (Upper Permian) in Nevada and Utah

Open-File Report 77-470

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Abstract

The Gerster Limestone contains three minor lithofacies: the packstone, wackestone, and mixed facies, differentiated largely on the basis of the carbonate matrix and mud content of the rocks. Five biostratigraphic zones ranging in age from Roadian-Wordian to Wordian are, in ascending order, the Thamnosia, Kuvelousia, transition, Yakovlevia, and upper zones. The Gerster was probably deposted in a protected coastal basin separated from the Phosphoria Basin by a shallow marine positive area. The brachiopod fauna is divided into fifteen bioassociations. The fauna is part of a continental margin suite of faunas distributed from west Texas to the Canadian Arctic and belongs to the Tethyan-nonreef biogeographica[ province.

Additional Publication Details

Publication type:
Report
Publication Subtype:
USGS Numbered Series
Title:
The biostratigraphy and paleoecology of the Gerster limestone (Upper Permian) in Nevada and Utah
Series title:
Open-File Report
Series number:
77-470
Edition:
-
Year Published:
1977
Language:
ENGLISH
Publisher:
U.S. Geological Survey,
Description:
125 leaves, [42] leaves of plates :ill., maps ;28 cm.; (124 p. - PGS)