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Book Chapter

A Textural Analysis of Trona and Associated Lithologies, Wilkins Peak Member, Eocene Green River Formation, Southwestern Wyoming

By
Stuart J. Birnbaum
Stuart J. Birnbaum
Geology Department, Wayne State University, Detroit, Michigan 48202
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Thomas M. Radlick
Thomas M. Radlick
Geology Department, Wayne State University, Detroit, Michigan 48202
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Published:
January 01, 1982

Abstract

A TexasGulf composite core representing deposition during Wilkins Peak time of the Green River Formation (Eocene) is described. Two major facies, a mudstone facies and a trona facies, represent deposition within ephemeral alkaline saline Lake Gosiute. A laminated mud-stone subfacies indicates a distal saline mudflat subenvironment, whereas a crumbly, homogeneous mudstone formed within a proximal saline mudflat subenvironment. Oil shale signifies flooding and expansion of the lake with associated organic blooms. Drying of the lake permitted precipitation of trona in two forms; a) a displacive nodular type consisting of radiating crystals, and b) a granular or sugary type of detrital origin. A third, postdepositional trona type is described as a columnar crystalline vein type associated with hydraulic fracturing.

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Contents

SEPM Core Workshop Notes

Depositional and Diagenetic Spectra of Evaporites - A Core Workshop

C. Robertson Handford
C. Robertson Handford
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Robert G. Loucks
Robert G. Loucks
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Graham R. Davies
Graham R. Davies
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SEPM Society for Sedimentary Geology
Volume
3
ISBN electronic:
9781565762589
Publication date:
January 01, 1982

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