| State | Texas |
|---|---|
| Name | Manning, Wellborn, and Cadell Formations, undivided |
| Geologic age | Eocene |
| Lithologic constituents |
Major
Sedimentary > Clastic > Mudstone > Claystone (Bed)
Minor
Sedimentary > Clastic > Sandstone (Bed)
Incidental
Sedimentary > Clastic > Mudstone > Claystone > Bentonite (Bed)
|
| Comments | clay, sandstone, siltstone, clay massive to laminated, sl. carbonaceous or lignitic, bentonitic, tuffaceous, thin interbeds of tuffaceous siltst; sandst in upper part, v. fine to fine grained, silty, well bedded to crossbedded; in lower part tuffaceous, contains fossil wood; thickness 350-500 ft. |
| References | Bureau of Economic Geology, 1974, Seguin Sheet, Geologic Atlas of Texas, University of Texas, Bureau of Economic Geology, scale 1:250,000.Bureau of Economic Geology, 1974, San Antonio Sheet, Geologic Atlas of Texas, University of Texas, Bureau of Economic Geology, scale 1:250,000.Bureau of Economic Geology, 1976, Crystal City-Eagle Pass 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 | Atascosa - McMullen |