Coleman Junction Formation (TXPcj;0)

State	Texas
Name	Coleman Junction Formation
Geologic age	Phanerozoic \| Paleozoic \| Permian [Wolfcamp]
Original map label	Pcj
Comments	Mostly mudstone, tan, gray, in part sandy, local thin sandst. beds. Coleman Limestone gray, grayish-green fine to coarse grained, bioclastic, thin beds, wavy-nodular; fossils mostly crinoid frags, phylloid algae, and fusulinids. Thickness of formation 30-50 ft
Primary rock type	mudstone
Secondary rock type	limestone
Other rock types	sandstone
Lithologic constituents	Major Sedimentary > Clastic > Mudstone > Claystone (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	Callahan - Coleman - Concho - McCulloch - Shackelford - Throckmorton