Dolores Fm

Red siltstone, shale, sandstone, and limestone-pellet conglomerate
State Colorado
Name Dolores Fm
Geologic age Triassic
Lithologic constituents
Major
Sedimentary > Clastic > Siltstone
Sedimentary > Clastic > Mudstone > Shale
Sedimentary > Clastic > Sandstone
Minor
Sedimentary > Clastic > Conglomeratelimestone-pellet conglomerate
References

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

NGMDB product
Counties Archuleta - Dolores - Hinsdale - La Plata - Montezuma - San Juan - San Miguel