Comanche Peak Limestone and Walnut Clay, undivided

Comanche Peak Limestone and Walnut Clay, undivided
State Texas
Name Comanche Peak Limestone and Walnut Clay, undivided
Geologic age Early Cretaceous
Lithologic constituents
Major
Sedimentary > Carbonate > Limestone (Bed)
Minor
Sedimentary > Clastic > Mixed-clastic > Sandstone-mudstone (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.
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 Brown - Callahan - Comanche - Eastland