The biostratigraphy and paleoecology of the Gerster limestone (Upper Permian) in Nevada and Utah
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.
Citation Information
Publication Year | 1977 |
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Title | The biostratigraphy and paleoecology of the Gerster limestone (Upper Permian) in Nevada and Utah |
DOI | 10.3133/ofr77470 |
Authors | Bruce R. Wardlaw |
Publication Type | Report |
Publication Subtype | USGS Numbered Series |
Series Title | Open-File Report |
Series Number | 77-470 |
Index ID | ofr77470 |
Record Source | USGS Publications Warehouse |