The Chugwater Formation is a mapped bedrock unit consisting primarily of red sandstone, in the states of Wyoming, Montana, and Colorado in the USA. It is recognized as a Formation in Colorado and Montana, but as a Group (sequence of Formations) in Wyoming .
Due to its lack of fossils and its presence below the highly-studied Morrison Formation, the Chugwater receives little attention.
Read more about Chugwater Formation: Description, Age
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