Geologic units in Yoakum county, Texas

Sand sheet deposits (Holocene) at surface, covers 51 % of this area

Sand sheet deposits

Blackwater Draw Formation (Pleistocene) at surface, covers 24 % of this area

Blackwater Draw Formation

Sand deposits, undivided (Holocene) at surface, covers 14 % of this area

Sand deposits, undivided

Ogallala Formation (Pliocene to Miocene) at surface, covers 10 % of this area

Ogallala Formation

Pond deposits (Pleistocene) at surface, covers 0.3 % of this area

Pond deposits

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

Sand dune deposits