Geologic units in Jim Hogg county, Texas

Goliad Formation (Miocene) at surface, covers 36 % of this area

Goliad Formation

Sand sheet deposits (Holocene) at surface, covers 31 % of this area

Sand sheet deposits

Dune sand sheet deposits (Holocene) at surface, covers 22 % of this area

Dune sand sheet deposits

Catahoula Formation and Frio Clay, undivided (Oligocene) at surface, covers 10 % of this area

Catahoula Formation and Frio Clay, undivided

Jackson Group, undivided (Oligocene and Eocene) at surface, covers 1 % of this area

Jackson Group, undivided

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

Sand dune deposits

Alluvium (Holocene) at surface, covers < 0.1 % of this area

Alluvium