Geologic units in Haskell county, Texas

Clear Fork Group (Permian; Leonard Series) at surface, covers 43 % of this area

Clear Fork Group

Seymour Formation (Middle Pleistocene; Irvingtonian) at surface, covers 14 % of this area

Seymour Formation

Quaternary deposit, undivided (Quaternary) at surface, covers 11 % of this area

Quaternary deposit, undivided

Sand sheet deposits (Holocene) at surface, covers 10 % of this area

Sand sheet deposits

Dune sand sheet deposits (Holocene) at surface, covers 9 % of this area

Dune sand sheet deposits

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

Lueders Formation

Alluvium (Holocene) at surface, covers 4 % of this area

Alluvium

Terrace deposits (Pleistocene and Holocene) at surface, covers 1 % of this area

Terrace deposits

Talpa Formation (Permian; Leonard Series) at surface, covers 1 % of this area

Talpa Formation

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

Playa deposits

Grape Creek Formation (Permian; Leonard Series) at surface, covers 0.2 % of this area

Grape Creek Formation

San Angelo Formation (Permian; Guadalupe Series) at surface, covers 0.1 % of this area

San Angelo Formation

Bead Mountain Formation (Permian; Leonard Series) at surface, covers < 0.1 % of this area

Bead Mountain Formation