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Geologic units in Hockley county, Texas

Blackwater Draw Formation (Pleistocene) at surface, covers 91 % of this area

Blackwater Draw Formation

Ogallala Formation (Pliocene to Miocene) at surface, covers 6 % of this area

Ogallala Formation

Tahoka Formation (Pleistocene; Wisconsinan) at surface, covers 1 % of this area

Tahoka Formation

Sand dune deposits (Holocene) at surface, covers 0.9 % of this area

Sand dune deposits

Playa deposits (Pleistocene and Holocene) at surface, covers 0.2 % of this area

Playa deposits

Sand sheet deposits (Holocene) at surface, covers 0.2 % of this area

Sand sheet deposits

Sand deposits, undivided (Holocene) at surface, covers 0.1 % of this area

Sand deposits, undivided

Pond deposits (Pleistocene) at surface, covers < 0.1 % of this area

Pond deposits

Duck Creek Limestone and Kiamichi Formation, undivided (Early Cretaceous) at surface, covers < 0.1 % of this area

Duck Creek Limestone and Kiamichi Formation, undivided; Eastern part of Trans-Pecos and High Plains.