San Angelo Formation

San Angelo Formation
State Texas
Name San Angelo Formation
Geologic age Permian; Guadalupe Series
Lithologic constituents
Sedimentary > Clastic > Mixed-clastic > Sandstone-mudstone (Bed)
Sedimentary > Carbonate > Dolostone (Bed)
Sedimentary > Chemical > Evaporite > Gypsum (Bed)
Comments Mudstone, sandstone, siltstone, and gypsum. mostly mudst and siltst, brownish-red and lt-gray, thin lenses of satin spar gypsum and alabaster gypsum nodules, thin dolomite beds and barite nodules near top; also minor sandst as channel-fill bodies and thin sheets. Lower part (Duncan Member) mostly sandst. with silica, calcite,and gypsum cement. Thickness of San Angelo Fm 90-120 ft
Stratigraphic units Pease River Group

Bureau of Economic Geology, 1987, Wichita Falls-Lawton Sheet, Geologic Atlas of Texas: University of Texas at Austin, Bureau of Economic Geology, scale 1:250,000.

Bureau of Economic Geology, 1992, Geologic Map of Texas: University of Texas at Austin, Virgil E. Barnes, project supervisor, Hartmann, B.M. and Scranton, D.F., cartography, scale 1:500,000.

NGMDB product
Counties Coke - Fisher - Foard - Hardeman - Haskell - Jones - King - Knox - Nolan - Runnels - Stonewall - Taylor - Tom Green - Wilbarger