Wasatch Fm (including Fort Union equivalent at base) and Ohio Creek Fm

Claystone, mudstone, sandstone, and conglomerate
State Colorado
Name Wasatch Fm (including Fort Union equivalent at base) and Ohio Creek Fm
Geologic age Tertiary
Lithologic constituents
Major
Sedimentary > Clastic > Mudstone > Claystone
Minor
Sedimentary > Clastic > Mudstone
Sedimentary > Clastic > Sandstone
Sedimentary > Clastic > Conglomerate
Sedimentary > Clastic > Mudstone > Shale
References

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

NGMDB product
Counties Delta - Garfield - Gunnison - Mesa - Pitkin - Rio Blanco