Mancos Shale
Late Cretaceous geologic formation of the Western United States / From Wikipedia, the free encyclopedia
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The Mancos Shale or Mancos Group is a Late Cretaceous (Upper Cretaceous) geologic formation of the Western United States.
Quick Facts Type, Sub-units ...
Mancos Shale | |
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Stratigraphic range: Mid Albian-Campanian ~110–80 Ma | |
Type | Geologic formation |
Sub-units | See text |
Underlies | Mesaverde Formation |
Overlies | Dakota Group |
Lithology | |
Primary | Shale |
Location | |
Coordinates | 37.353°N 108.297°W / 37.353; -108.297 |
Region | Arizona, Colorado, New Mexico, Utah, Wyoming |
Country | United States |
Extent | Basin and Range, Colorado Plateau & San Juan Mountains Provinces |
Type section | |
Named for | Mancos, Colorado |
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The Mancos Shale was first described by Cross and Purington in 1899[1] and was named for exposures near the town of Mancos, Colorado.