|Name||Elm Creek Formation|
|Geologic age||Permian; Leonard Series|
Sedimentary > Clastic > Mudstone > Shale (Bed)
Sedimentary > Clastic > Mudstone (Bed)
Sedimentary > Carbonate > Limestone (Bed)
|Comments||Shale, mudstone, limestone. Shale mostly in upper part, tan, gray, reddish-brn mudstone locally interbedded, increa. reddish northward, thick bedded. Limestone is nodular, intercalated with thin shale beds in zones 1-15 ft thick, beds thin northward, sparsely fossiliferous; basal beds make escarpment. Thickness of unit 130-150 ft.|
|Stratigraphic units||Albany Group (revised), Wichita Group (revised)|
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||Baylor - Callahan - Coleman - Concho - McCulloch - Shackelford - Throckmorton|