Geologic units in Reagan county, Texas

Edwards Limestone (Early Cretaceous) at surface, covers 40 % of this area

Edwards Limestone

Blackwater Draw Formation (Pleistocene) at surface, covers 26 % of this area

Blackwater Draw Formation

Quaternary deposit, undivided (Quaternary) at surface, covers 22 % of this area

Quaternary deposit, undivided

Buda Limestone (Early Cretaceous) at surface, covers 9 % 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.

Tahoka Formation (Pleistocene; Wisconsinan) at surface, covers 0.6 % of this area

Tahoka Formation

Caliche deposits (Pleistocene and Holocene) at surface, covers 0.6 % of this area

Caliche deposits

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

Playa deposits

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

Alluvium

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

Terrace deposits