Chugwater Formation photograph

Chugwater Formation

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Primary Sandstone
Named forChugwater
Named byN. H. Darton
OverliesDinwoody Formation
Goose Egg Formation
UnderliesNugget Sandstone
Morrison Formation
Date of Reg.
Date of Upd.
ID2174024
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About Chugwater Formation


The Chugwater Formation is a mapped bedrock unit consisting primarily of red sandstone, in the states of Wyoming, Montana, and Colorado in the United States. It is recognized as a geologic formation in Colorado and Montana, but as a Group in Wyoming.

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