| State | Texas |
|---|---|
| Name | Escondido Formation |
| Geologic age | Late Cretaceous; Gulfian Series |
| Lithologic constituents |
Major
Sedimentary > Clastic > Mudstone > Shale > Black-shale (Bed)
Minor
Sedimentary > Clastic > Siltstone (Bed)
Sedimentary > Clastic > Sandstone (Bed)
|
| Comments | shale, siltstone, and sandstone; shale gray to bluish gray; siltst. brn-yell, thin bedded; sandst. fine grained calcareous, in part asphaltic, argillaceous, gray, flaggy bedded; thickness 200-875 ft, thins westward. |
| Stratigraphic units | Navarro Group |
| References | 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, 1977, Del Rio 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, 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 | Bexar - Kinney - Maverick - Medina - Uvalde - Zavala |