Arapien Shale

Arapien Shale (Summerville Formation, Entrada Sandstone and Carmel Formation).
State Utah
Name Arapien Shale
Geologic age Middle Jurassic
Lithologic constituents
Major
Sedimentary > Clastic > Mudstone (Bed)
Minor
Sedimentary > Chemical > Evaporite (Bed)
Sedimentary > Clastic > Sandstone (Bed)Entrada
Sedimentary > Carbonate > Limestone (Bed)
Comments marine, saline-rich basin
Stratigraphic units Twist Gulch Formation, Twin Creek Limestone
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.

Witkind, I.J., Weiss, M.P., and Brown, T.L., 1987, Geologic map of the Manti 30' x 60' quadrangle, Carbon, Emery, Juab, Sanpete, and Sevier counties, Utah: U.S. Geological Survey Miscellaneous Investigations Series Map I-1631, scale 1:100.000.

https://pubs.er.usgs.gov/publication/i1631

NGMDB product
Counties Juab - Sanpete - Sevier - Utah