Palo Pinto Formation (TXPApp;0)

State	Texas
Name	Palo Pinto Formation
Geologic age	Phanerozoic \| Paleozoic \| Carboniferous Pennsylvanian [Missouri]
Original map label	IPpp
Comments	Sandstone, shale, and limestone; shale, gray, commonly calcareous, several sandstone lentils. Thickness 70-100 ft. Wiles Limestone, gray, fine- to- coarse-grained, irregularly bedded, thin- to medium-bedded, bioclastic, algae common, thickness 1-4 ft. Oran Sandstone, tan to brown, fine- to medium-grained, ferruginous, locally crossbedded, channel-fill bodies in lower part, massive upward, forms rounded bench, fossils plant fragments common in lower part, thickness up to 30 ft.
Primary rock type	sandstone
Secondary rock type	shale
Other rock types	limestone
Lithologic constituents	Major Sedimentary > Clastic > Mudstone > Shale (Bed) Sedimentary > Clastic > Sandstone (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, 1987, Wichita Falls-Lawton Sheet, Geologic Atlas of Texas: University of Texas at Austin, Bureau of Economic Geology, scale 1:250,000.
Geographic coverage	Eastland - Jack - Palo Pinto - Parker - Stephens