| State | Colorado |
|---|---|
| Name | Colorado Group |
| Geologic age | Cretaceous |
| Lithologic constituents | Major
Sedimentary > Clastic > Mudstone > Shale
Sedimentary > Carbonate > Limestone
|
| References | Tweto, Ogden, 1979, Geologic Map of Colorado: U.S. Geological Survey Special Geologic Map, scale 1:500,000. |
| NGMDB product | |
| Counties | Boulder - Douglas - Eagle - Fremont - Grand - Jackson - Jefferson - Larimer - Park - Summit |