Comanche Peak Limestone, Walnut Clay, and Antlers Sand, undivided

Comanche Peak Limestone, Walnut Clay, and Antlers Sand, undivided; North, central, and south Texas including Quaternary for all of west Texas.
State Texas
Name Comanche Peak Limestone, Walnut Clay, and Antlers Sand, undivided
Geologic age Early Cretaceous
Lithologic constituents
Major
Sedimentary > Carbonate > Limestone (Bed)
Minor
Sedimentary > Clastic > Mixed-clastic > Sandstone-mudstone (Bed)
Sedimentary > Clastic > Mudstone > Shale > Black-shale (Bed)
Comments Comanche Peak Limestone--med-gray, poorly bedded ls. and clayey ls., argillaceous, thin shale interbeds, v. finely crystalline, in upper part clastic ls; v. fossilif., thickness 40-60 ft. Comanche Pk Ls overlies Walnut Clay and underlies Edwards Ls. Walnut Clay--interbedded shale, limestone, and sandstone. thickness 25+-ft. Antlers Sand--sand, sandstone, and conglomerate.
References

Bureau of Economic Geology, 1983, Lubbock 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 Borden - Garza - Lubbock - Lynn - Stonewall