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Conodont paleoecology of the Permian Phosphoria Formation and related rocks of Wyoming and adjacent areas
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-
Published:January 01, 1984
Five marine biofacies based on conodont distributions are recognized for the Permian Phosphoria Formation and related rocks. They are: (1) facies with no conodonts, (2) facies with Hindeodus only, (3) facies with Hindeodus and (or) Neostreptognathodus and (or) Stepanovites and (or) Merrillina, (4) a transitional facies containing any of the components of biofacies 3 with either Neogondolella or Xaniognathus, (5) facies dominated by Neogondolella and Xaniognathus. These biofacies (1–5) represent progressive shore or nearshore to offshore differentiation of the conodont faunas.
Intervals of phosphate deposition within the Phosphoria Formation correspond to shoreward encroachment of offshore biofacies during trasgressive events. Elements...
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GSA Special Papers
Conodont Biofacies and Provincialism
Author(s)
Geological Society of America

Volume
196
Copyright:
© 1984 Geological Society of America
Geological Society of America
ISBN print:
9780813721965
Publication date:
January 01, 1984
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