Seven Rivers Formation (TXPsr;0)

State	Texas
Name	Seven Rivers Formation
Geologic age	Phanerozoic \| Paleozoic \| Permian [Guadalupe]
Original map label	Psr
Comments	Dolomite, some dolomitic limestone, fine grained, medium to thick bedded, light gray to very pale orange; grades to Capitan Limestone northward (reefward); marine microfossils; thickness 440 ft.
Primary rock type	dolostone (dolomite)
Secondary rock type	limestone
Other rock types
Lithologic constituents	Major Sedimentary > Carbonate > Dolostone (Bed) Minor Sedimentary > Carbonate > Limestone (Bed)
Map references	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
Unit references	Bureau of Economic Geology, 1968, Van Horn-El Paso Sheet, Geologic Atlas of Texas: Bureau of Economic Geology, The University of Texas at Austin, scale 1:250,000.
Geographic coverage	Culberson - Jeff Davis