Quartermaster Formation (TXPq;0)

State	Texas
Name	Quartermaster Formation
Geologic age	Phanerozoic \| Paleozoic \| Permian [Guadalupe]
Original map label	Pq
Comments	shale, siltstone, sandstone, gypsum, and dolomite, interbedded. Shale indurate, thin interbeds of satinspar, various shades of red, reddish-brown, reddish-orange. Sandst fine-grain quartz, red, reddish-orange. Shale sandy, massive, red. gypsum and dolomite discontinuous and thin bedded. Thickness 300 + ft.
Primary rock type	shale
Secondary rock type	sandstone
Other rock types	evaporite; dolostone (dolomite)
Lithologic constituents	Major Sedimentary > Clastic > Mudstone > Shale (Bed) Minor Sedimentary > Carbonate > Limestone (Bed) Sedimentary > Chemical > Evaporite > Gypsum (Bed) Sedimentary > Clastic > Mixed-clastic > Sandstone-mudstone (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, Plainview Sheet, Geologic Atlas of Texas, Bureau of Economic Geology, University of Texas at Austin, scale 1:250,000. Bureau of Economic Geology, 1983, Tucumcari Sheet, Geologic Atlas of Texas, Bureau of Economic Geology, University of Texas at Austin, scale 1:250,000.
Geographic coverage	Armstrong - Briscoe - Coke - Crosby - Dickens - Donley - Fisher - Floyd - Garza - Hall - Kent - King - Mitchell - Motley - Nolan - Randall - Scurry - Sterling - Stonewall