Hermosa Group and Molas Formation

Hermosa Group (Honaker Trail Fm, Paradox Fm (oil, salt, potash), Pinkerton Trail Fm) and Molas Formation.
State Utah
Name Hermosa Group and Molas Formation
Geologic age Mississipian to Pennsylvanian
Lithologic constituents
Major
Sedimentary > Chemical > Evaporite (Bed)salt, potash, gypsum
Minor
Sedimentary > Clastic > Mudstone > Shale > Black-shale (Bed)
Comments Molas is red paleosol. Pinkerton Trail Formation marine. Paradox evaporite basin (sabkha); has oil, salt, potash
References

Hintze, L.F., 1980, Geologic map of Utah: Utah Geological and Mineral Survey, scale 1:500,000.

Hintze, L.F., 1988, Geologic History of Utah: Brigham Young University Geology Studies Special Publication 7, 202 p.

Baars, D.L., 2000, Geology of Canyonlands National Park Utah, in Sprinkel, D.A., Chidsey, Jr., T.C., and Anderson, P.B., Geology of Utah's Parks and Monuments: Utah Geological Association Publication 28, p. 61-83.

Stevenson, G.M., 2002, Geology of Goosenecks State Park, San Juan County, Utah, in Sprinkel, D.A., Chidsey, Jr., T.C., and Anderson, P.B., Geology of Utah's Parks and Monuments: Utah Geological Association Publication 28, p. 433-447.

NGMDB product
Counties Emery - Garfield - Grand - San Juan - Wayne