Wilcox Group, undivided

Wilcox Group, undivided
State Texas
Name Wilcox Group, undivided
Geologic age Paleocene to Eocene
Lithologic constituents
Major
Sedimentary > Clastic > Mudstone (Glauconitic)
Minor
Sedimentary > Clastic > Mixed-clastic > Conglomerate-sandstone (Bed)
Incidental
Sedimentary > Coal > Lignite (Bed)
Comments Mostly mudstone, with various amounts of sandst., lignite, ironstone concretions, glauconitic; thickness about 1,000 ft. sand, mudst., clay, mudst. conglo., thickness as much as 300 ft. lower part mostly mudstone, thickness about 500 +- ft. Total thickness roughly 1,400-1,800 ft.
Stratigraphic units top down, Calvert Bluff Fm, Simsboro Fm, Hooper Fm.
References

Bureau of Economic Geology, 1974, Austin 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, 1974, Seguin Sheet, Geologic Atlas of Texas, University of Texas, Bureau of Economic Geology, scale 1:250,000.

Bureau of Economic Geology, 1972, Dallas sheet, Geologic Atlas of Texas, Bureau of Economic Geology, 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 Anderson - Atascosa - Bastrop - Bexar - Bowie - Caldwell - Camp - Cass - Cherokee - Franklin - Freestone - Gonzales - Guadalupe - Harrison - Henderson - Hopkins - Kaufman - Marion - Medina - Milam - Morris - Nacogdoches - Navarro - Panola - Rains - Robertson - Rusk - Sabine - San Augustine - Shelby - Smith - Titus - Uvalde - Van Zandt - Wilson - Wood