State | Colorado |
---|---|
Name | Dakota Group and Morrison And Ralston Creek Fms at mountain front between Boulder and Colorado Springs. Dakota, Purgatoire, Morrison, and Ralston Creek Fms in Canon City area |
Geologic age | Cretaceous-Jurassic |
Lithologic constituents |
Major
Sedimentary > Clastic > Mudstone > Shale
Sedimentary > Clastic > Sandstone
Sedimentary > Clastic > Mudstone
Minor
Sedimentary > Clastic > Mudstone > Claystone
|
References | Tweto, Ogden, 1979, Geologic Map of Colorado: U.S. Geological Survey Special Geologic Map, scale 1:500,000. |
NGMDB product | |
Counties | Boulder - Douglas - Fremont - Jefferson |