Geologic units in Real county, Texas

Edwards Limestone (Early Cretaceous) at surface, covers 55 % of this area

Edwards Limestone

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

Glen Rose Limestone

Devils River Limestone (Early Cretaceous; Comanchean Series) at surface, covers 19 % of this area

Devils River Limestone

Quaternary deposit, undivided (Quaternary) at surface, covers 5 % of this area

Quaternary deposit, undivided

Buda Limestone and Del Rio Clay, undivided (Late Cretaceous) at surface, covers 0.9 % 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.