| State | Texas |
|---|---|
| Name | Undivided part of Washita Group |
| Geologic age | Early Cretaceous; Comanchean Series |
| Lithologic constituents |
Major
Unconsolidated > Fine-detrital > Clay (Bed)
Minor
Sedimentary > Carbonate > Limestone (Bed)
Unconsolidated > Marl (Bed)
|
| Comments | Thick clay units and thin limestone units; thickness 200 ft. Clayst., mudst., and sandst. Aphanitic limest. forms ledge, marine megafossils, alternating clay, marl, and limestone. |
| References | Bureau of Economic Geology, 1972, Dallas sheet, Geologic Atlas of Texas, Bureau of Economic Geology, 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 | Bosque - Erath - Hill - Hood - Johnson - McLennan - Parker - Somervell - Tarrant |