Geologic units in Upton county, Texas

Blackwater Draw Formation (Pleistocene) at surface, covers 38 % of this area

Blackwater Draw Formation

Quaternary deposit, undivided (Quaternary) at surface, covers 23 % of this area

Quaternary deposit, undivided

Edwards Limestone (Early Cretaceous) at surface, covers 11 % of this area

Edwards Limestone

Fredericksburg Group (Early Cretaceous; Comanchean Series) at surface, covers 9 % of this area

Fredericksburg Group

Caliche deposits (Pleistocene and Holocene) at surface, covers 7 % of this area

Caliche deposits

Washita Group (Early and Late Cretaceous; Comanchean Series) at surface, covers 4 % of this area

Washita Group

Maxon Sandstone and Glen Rose Limestone, undivided (Early Cretaceous) at surface, covers 4 % of this area

Maxon Sandstone and Glen Rose Limestone, undivided

Alluvium (Holocene) at surface, covers 2 % of this area

Alluvium

Sand sheet deposits (Holocene) at surface, covers 1 % of this area

Sand sheet deposits

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

Dune sand sheet deposits

Buda Limestone (Early Cretaceous) at surface, covers < 0.1 % of this area

Buda Limestone; Eastern part of Trans-Pecos and High Plains and Western part of Trans-Pecos and North, central, and south Texas including Quaternary for all of west Texas.

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

Playa deposits

Tahoka Formation (Pleistocene; Wisconsinan) at surface, covers < 0.1 % of this area

Tahoka Formation

Dockum Group, undivided (Late Triassic) at surface, covers < 0.1 % of this area

Dockum Group

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

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

Sand dune deposits