Cutoff Formation

Cutoff Formation
State Texas
Name Cutoff Formation
Geologic age Permian; Leonard Series
Lithologic constituents
Major
Sedimentary > Clastic > Mudstone > Shale > Black-shale (Bed)
Sedimentary > Clastic > Mixed-clastic > Sandstone-mudstone (Bed)
Incidental
Sedimentary > Carbonate > Limestone (Bed)
Comments shale, siltstone, sandstone, and limestone. Diablo Mtns--discontin. outcrops mapped with Victorio Peak Ls; mostly shale, in part siliceous and black, in part sandy and brown; some soft ss., some cherty ls., thin bedded, blk, brwnish-yell and gray; thickness 230 ft. North of Sierra Diablo interbedded ls, shale, and ss., thickness 250-275 ft. Northwest end of Apache Mtns mostly clay shale and siltst. thickness 230 ft
Stratigraphic units Cutoff Shale (as named in Van Horn-El Paso Sheet)
References

Bureau of Economic Geology, 1968, Van Horn-El Paso Sheet, Geologic Atlas of Texas: Bureau of Economic Geology, The University of Texas at Austin, 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 Culberson - Hudspeth