Admiral Formation

Admiral Formation
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