| State | Texas |
|---|---|
| Name | Coleman Junction Formation |
| Geologic age | Permian; Wolfcamp Series |
| Lithologic constituents |
Major
Sedimentary > Clastic > Mudstone > Claystone (Bed)
Minor
Sedimentary > Carbonate > Limestone (Bed)
|
| 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 |
| Stratigraphic units | Albany Group (revised), Wichita Group (revised), Coleman Junction Limestone |
| 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.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. |
| NGMDB product | |
| Counties | Callahan - Coleman - Concho - McCulloch - Shackelford - Throckmorton |