Morrison and Ralston Creek Fms

Ralston Creek Fm: Claystone, sandstone, limestone, and gypsum
State Colorado
Name Morrison and Ralston Creek Fms
Geologic age Jurassic
Lithologic constituents
Major
Sedimentary > Carbonate > Limestone
Sedimentary > Clastic > Mudstone > Claystone
Sedimentary > Clastic > Sandstone
Minor
Sedimentary > Chemical > Evaporite > Gypsum
References

Tweto, Ogden, 1979, Geologic Map of Colorado: U.S. Geological Survey Special Geologic Map, scale 1:500,000.

NGMDB product
Counties El Paso - Fremont - Pueblo