| State | Texas |
|---|---|
| Name | Archer City Formation |
| Geologic age | Permian; Wolfcamp Series |
| Lithologic constituents |
Major
Sedimentary > Clastic > Mudstone > Shale > Black-shale (Bed)
Minor
Sedimentary > Clastic > Conglomerate (Bed)
Sedimentary > Clastic > Sandstone (Bed)
Sedimentary > Clastic > Siltstone (Bed)
|
| Comments | mudstone, sandstone, siltstone, and conglomerate. 350-400 ft thick. Stratotype 5 mi SE Archer City, TX. Mostly reddish-brown mudst. exposed below cuesta-forming ss. Nine conglomeratic sandstone members separated by 10-50 ft of yell-brn and reddish-brn mudstone in Montague and eastern Clay Cos. Mudst thickens west. Calcar nodules and some siltstone. |
| Stratigraphic units | Cisco Group, Bowie Group (new) |
| References | Hentz, T., 1988, Lithostratigraphy and paleoenvironments of upper Paleozoic continental red beds, north-central Texas: Bowie (new) and Wichita (revised) Groups: Texas Bureau of Economic Geology, Report of Investigations 170.Bureau of Economic Geology, 1987, Wichita Falls-Lawton Sheet, Geologic Atlas of Texas: University of Texas at Austin, 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 | Archer - Baylor - Clay - Montague - Throckmorton - Young |