Geologic units in Tom Green county, Texas

Quaternary deposit, undivided (Quaternary) at surface, covers 52 % of this area

Quaternary deposit, undivided

Edwards Limestone (Early Cretaceous) at surface, covers 32 % of this area

Edwards Limestone

Antlers Sand (Early Cretaceous) at surface, covers 6 % of this area

Antlers Sand

Alluvium (Holocene) at surface, covers 4 % of this area

Alluvium

Lingos Formation (Middle (?) Pleistocene to Recent) at surface, covers 2 % of this area

Lingos Formation

San Angelo Formation (Permian; Guadalupe Series) at surface, covers 2 % of this area

San Angelo Formation

Blaine Formation (Permian; Guadalupe Series) at surface, covers 0.9 % of this area

Blaine Formation

Clear Fork Group (Permian; Leonard Series) at surface, covers 0.6 % of this area

Clear Fork Group

Ogallala Formation (Pliocene to Miocene) at surface, covers 0.3 % of this area

Ogallala Formation

Terrace deposits (Pleistocene and Holocene) at surface, covers 0.3 % of this area

Terrace deposits

Buda Limestone (Early Cretaceous) at surface, covers 0.2 % of this area

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.

Whitehorse Group, undivided (Permian; Guadalupe Series) at surface, covers < 0.1 % of this area

Whitehorse Group, undivided

High gravel deposits (Pleistocene) at surface, covers < 0.1 % of this area

High gravel deposits