Hermosa Fm

Arkosic sandstone, conglomerate, shale, and limestone; gypsum and salt in Paradox Member present in salt anticlines near Utah border
State Colorado
Name Hermosa Fm
Geologic age Pennsylvanian
Lithologic constituents
Sedimentary > Clastic > Mudstone > Shale
Sedimentary > Clastic > Sandstone > Arkose
Sedimentary > Clastic > Conglomerate
Sedimentary > Chemical > Evaporite > Gypsum
Sedimentary > Carbonate > Limestone

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

NGMDB product
Counties Mesa - Montrose - Ouray - San Miguel