Petrolia Formation (TXPp;0)

State	Texas
Name	Petrolia Formation
Geologic age	Phanerozoic \| Paleozoic \| Permian [Wolfcamp Leonard]
Original map label	Pp
Comments	Consists of sandstones decreasing and mudstone increasing upsection; 360-400 ft of mostly red-brown unstratified and crudely stratified mudstone and laminated and crossbedded, fossiliferous (plants, vertibrates, footprints) sandstone in lentils and channel-fill bodies; lenticular, calcareous-nodule, poorly indurated conglomerate locally containing vertebrate fossils. Limestone, gray, clayey, thin-bedded, sandy. Exposed in Fort Worth syncline, Bend arch, and Palo Duro basin
Primary rock type	mudstone
Secondary rock type	sandstone
Other rock types	limestone
Lithologic constituents	Major Sedimentary > Clastic > Mudstone > Shale (Bed) Minor Sedimentary > Clastic > Sandstone (Bed) Incidental 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. Hentz, T., 1988, Lithostratigraphy and paleoenvironments of upper Paleozoic continental red beds, north-central Texas: Bowie (new) and Wichita (revised) Groups: Texas Bureau of Economic Geology, Report of Investigations 170.
Geographic coverage	Archer - Baylor - Clay - Wichita