Dakota and Morrison Fms

Dakota and Morrison Fms
State Colorado
Name Dakota and Morrison Fms
Geologic age Cretaceous-Jurassic
Lithologic constituents
Major
Sedimentary > Clastic > Sandstone
Sedimentary > Clastic > Mudstone > Shale
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 Eagle - Fremont - Grand - Gunnison - Jackson - Park - Saguache - Summit