Geologic units in Dawson county, Texas

Blackwater Draw Formation (Pleistocene) at surface, covers 78 % of this area

Blackwater Draw Formation

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

Sand sheet deposits

Ogallala Formation (Pliocene to Miocene) at surface, covers 5 % of this area

Ogallala Formation

Quaternary deposit, undivided (Quaternary) at surface, covers 3 % of this area

Quaternary deposit, undivided

Sand deposits, undivided (Holocene) at surface, covers 2 % of this area

Sand deposits, undivided

Edwards Limestone and Antlers Sand, undivided (Early Cretaceous) at surface, covers 1 % of this area

Edwards Limestone and Antlers Sand, undivided

Dockum Group, undivided (Late Triassic) at surface, covers 1 % of this area

Dockum Group

Tahoka Formation (Pleistocene; Wisconsinan) at surface, covers 0.4 % of this area

Tahoka Formation

Alluvium (Holocene) at surface, covers 0.2 % of this area

Alluvium

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

Playa deposits

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

Sand dune deposits