| State | Texas |
|---|---|
| Name | Admiral Formation |
| Geologic age | Permian; Wolfcamp Series |
| Lithologic constituents |
Major
Sedimentary > Clastic > Mudstone > Claystone (Bed)
Sedimentary > Clastic > Mudstone > Shale (Bed)
Incidental
Sedimentary > Carbonate > Limestone (Bed)
Sedimentary > Clastic > Sandstone (Bed)
|
| Comments | Mudstone, shale, sandstone, and limestone. Mostly mudstone and shale tan, gray, greenish-brown, reddish-brown, reddish mudstone more abdt northward. rare lentils of sandy and clayey limestone in southern part. Overall Limestone gray, fine to coarse grained, bioclastic, thin beds, wavy-nodular; fossils mostly crinoid frags, phylloid algae, and fusulinids; ls. 5-15 ft thick in e lenticular beds(so. Throckmorton Co.). Thickness of formation 200-240 ft. |
| Stratigraphic units | Albany Group (revised), Wichita Group (revised), Overall Limestone, Hords Creek Limestone |
| References | 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 | Callahan - Coleman - Concho - McCulloch - Shackelford - Throckmorton |