| Mancos Shale | |
|---|---|
| Stratigraphic range: Mid Albian-Campanian ~ | |
 Mancos Shale at its type location just north of Mancos, Colorado | |
| Type | Geologic formation |
| Sub-units | See text |
| Underlies | Mesaverde Formation |
| Overlies | Dakota Group |
| Lithology | |
| Primary | Shale |
| Location | |
| Coordinates | 37°21′11″N 108°17′49″W / 37.353°N 108.297°W |
| 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 |
  Mancos Shale (the United States)  Mancos Shale (Colorado) | |
The Mancos Shale or Mancos Group is a Late Cretaceous (Upper Cretaceous) geologic formation of the Western United States.
The Mancos Shale was first described by Cross and Purington in 1899[1] and was named for exposures near the town of Mancos, Colorado.
- ^ Cross, C.W.; Purington, C. W. (1899). "Description of the Telluride quadrangle, Colorado". United States Geological Survey Atlas. Vol. 57.