Geologic units in Runnels county, Texas

Clear Fork Group (Permian; Leonard Series) at surface, covers 33 % of this area

Clear Fork Group

Quaternary deposit, undivided (Quaternary) at surface, covers 25 % of this area

Quaternary deposit, undivided

Lueders Formation (Permian; Leonard Series) at surface, covers 8 % of this area

Lueders Formation

Seymour Formation (Middle Pleistocene; Irvingtonian) at surface, covers 7 % of this area

Seymour Formation

Alluvium (Holocene) at surface, covers 6 % of this area

Alluvium

Talpa Formation (Permian; Leonard Series) at surface, covers 6 % of this area

Talpa Formation

Terrace deposits (Pleistocene and Holocene) at surface, covers 4 % of this area

Terrace deposits

Lingos Formation (Middle (?) Pleistocene to Recent) at surface, covers 3 % of this area

Lingos Formation

Grape Creek Formation (Permian; Leonard Series) at surface, covers 3 % of this area

Grape Creek Formation

Antlers Sand (Early Cretaceous) at surface, covers 2 % of this area

Antlers Sand

San Angelo Formation (Permian; Guadalupe Series) at surface, covers 1 % of this area

San Angelo Formation

Bead Mountain Formation (Permian; Leonard Series) at surface, covers 0.8 % of this area

Bead Mountain Formation

Edwards Limestone (Early Cretaceous) at surface, covers 0.7 % of this area

Edwards Limestone

Sand sheet deposits (Holocene) at surface, covers 0.3 % of this area

Sand sheet deposits

High gravel deposits (Pleistocene) at surface, covers 0.2 % of this area

High gravel deposits

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

Playa deposits