| State | Texas |
|---|---|
| Name | Comanchean rocks, undivided |
| Geologic age | Early Cretaceous; Washita Series |
| Lithologic constituents |
Major
Sedimentary > Carbonate > Limestone (Bed)
Sedimentary > Clastic > Mudstone > Shale (Bed)
Minor
Sedimentary > Carbonate > Marlstone (Bed)
|
| Comments | In Eastern part of Trans-Pecos and High Plains- limestone and shale, marl, clay, and limestone In Western part of Trans-Pecos Texas- Quitman Mtns and Sierra Blanco area--limestone and shale, marl, and clay.Diablo Plateau--marl and clay; Sierra Prieta--fossiliferous shale, sandy shale, and marl correlative with Benevides and younger formations. Cornudas Mtns and Dog Mtn--silty ls and shale conglomeratic ls., contains late Comanchean fossils. Kent area--Buda Ls and San Martine Mbr of Boracho Fm undivided. |
| References | Bureau of Economic Geology, 1968, Van Horn-El Paso Sheet, Geologic Atlas of Texas: Bureau of Economic Geology, The University of Texas at Austin, 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 | Hudspeth |