Geologic units in Val Verde county, Texas

Edwards Limestone (Early Cretaceous) at surface, covers 47 % of this area

Edwards Limestone

Salmon Peak Limestone (Early Cretaceous) at surface, covers 10 % of this area

Salmon Peak Limestone

Devils River Limestone (Early Cretaceous; Comanchean Series) at surface, covers 10 % of this area

Devils River Limestone

Bouquillas Formation (Late Cretaceous) at surface, covers 9 % of this area

Bouquillas Formation

Buda Limestone (Early Cretaceous) at surface, covers 7 % 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.

Buda Limestone and Del Rio Clay, undivided (Late Cretaceous) at surface, covers 4 % of this area

Buda Limestone and Del Rio Clay, undivided; 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.

Austin Chalk (Late Cretaceous; Gulfian Series) at surface, covers 3 % of this area

Austin Chalk

Uvalde Gravel (Pliocene to Pleistocene) at surface, covers 3 % of this area

Uvalde Gravel

Alluvium (Holocene) at surface, covers 2 % of this area

Alluvium

Eagle Ford Formation (Late Cretaceous) at surface, covers 1 % of this area

Eagle Ford Formation

Del Rio Clay (Late Cretaceous) at surface, covers 1 % of this area

Del Rio Clay

Quaternary deposit, undivided (Quaternary) at surface, covers 1 % of this area

Quaternary deposit, undivided

Terrace deposits (Pleistocene and Holocene) at surface, covers 0.5 % of this area

Terrace deposits

Land slide deposits (Pleistocene and Holocene) at surface, covers < 0.1 % of this area

Land slide deposits

Playa deposits (Pleistocene and Holocene) at surface, covers < 0.1 % of this area

Playa deposits

Older alluvial deposits (Pleistocene) at surface, covers < 0.1 % of this area

Older alluvial deposits