Geologic units in Kerr county, Texas

Edwards Limestone (Early Cretaceous) at surface, covers 75 % of this area

Edwards Limestone

Glen Rose Limestone (Early Cretaceous) at surface, covers 20 % of this area

Glen Rose Limestone

Terrace deposits (Pleistocene and Holocene) at surface, covers 3 % of this area

Terrace deposits

Buda Limestone and Del Rio Clay, undivided (Late Cretaceous) at surface, covers 1.0 % 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.

Alluvium (Holocene) at surface, covers 0.3 % of this area

Alluvium