Edwards Limestone
Hensell Sand
Alluvium
Terrace deposits
Canyon Group, undivided
Buda Limestone; Eastern part of Trans-Pecos and High Plains and Western part of Trans-Pecos and North, central, and south Texas including Quaternary for all of west Texas.
Quaternary deposit, undivided
Tanyard Formation
Permian rocks, undivided
Sparta Sand
Gorman Formation
Antlers Sand