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Geologic units in Carson county, Texas

Blackwater Draw Formation (Pleistocene) at surface, covers 60 % of this area

Blackwater Draw Formation

Ogallala Formation (Pliocene to Miocene) at surface, covers 36 % of this area

Ogallala Formation

Playa deposits (Pleistocene and Holocene) at surface, covers 2 % of this area

Playa deposits

Quartermaster Formation and Whitehorse Group, undivided (Permian; Guadalupe Series) at surface, covers 1 % of this area

Quartermaster Formation and Whitehorse Group, undivided

Dune sand sheet deposits (Holocene) at surface, covers < 0.1 % of this area

Dune sand sheet deposits