| State | Texas |
|---|---|
| Name | Edwards and Comanche Peak Limestones, undivided |
| Geologic age | Early Cretaceous |
| Lithologic constituents |
Major
Sedimentary > Carbonate > Dolostone (Bed)
Sedimentary > Carbonate > Limestone (Bed)
Incidental
Sedimentary > Chemical > Chert (Bed)
|
| Comments | Edwards Limstone, limestone, dolostone, and chert. limest. aphanitic to fine grained, massive to thin bedded, hard, brittle, in part rudistid biostromes, much miliolid biospartie; dolostone fine to v. fine grained, porous, med gray to grayish brown; chert, nodules and plates common. 60-350 ft thick, thins northward. Comanche Peak Limestone fine to v. fine grained, fairly hard, nodular, lt. gray weathers white, extensively burrowed. Thickness as much as 80 ft. |
| References | Bureau of Economic Geology, 1974, Austin Sheet, Geologic Atlas of Texas, University of Texas, 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 | Bell - Travis - Williamson |