|Geologic age||Pennsylvanian; Missouri Series|
Sedimentary > Carbonate > Limestone (Bed)
Sedimentary > Clastic > Mudstone > Shale > Black-shale (Bed)
|Comments||ls and shale. Mostly ls, gray to white, fine grained to coarsely bioclastic, thin bedded, irreg. beds and nodular, contains abdt phylloid algae, crinois frags, bryozoans, and brachiopods; locally interbedded calcar. shale sev. inches thick; forms dip slope and escarpment in so. Jack Co. Thickness of unit 20-40 ft|
|Stratigraphic units||Canyon 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.
|Counties||Brown - Coleman - Comanche - Eastland - Jack - McCulloch - Palo Pinto - Stephens|