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The AAPG/Datapages Combined Publications Database

Wyoming Geological Association

Abstract


The Cretaceous Geology of Wyoming; 36th Annual Field Conference Guidebook, 1985
Pages 75-79

Grieve Paleovalley of the Muddy Sandstone in the Eastern Wind River Basin, Wyoming

William H. Curry III

Abstract

During the deposition of the Lower Cretaceous Muddy Sandstone, a paleovalley was eroded by a river which crossed the west end of Casper Mountain and continued west through the Grieve oilfield into the eastern part of the Wind River Basin, Wyoming ( in pocket). Examination of the outcropping Muddy sandstones which were deposited in the Grieve paleovalley indicates that: 1) the lowest part of the paleovalley was filled with fluvial sands; 2) marine sands and muds filled the higher part of the paleovalley during marine transgression; and 3) muds filled with plant fragments and plant roots were deposited on islands or hills on the southwest flank of the paleovalley.


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