Geologic units in Jim Hogg county, Texas

sand sheet deposits (Phanerozoic | Cenozoic | Quaternary | Holocene) at surface, covers 31 % of this area: sand sheet deposits
Lithology: sand; silt
Jackson Group, undivided (Phanerozoic | Cenozoic | Tertiary | Eocene Oligocene) at surface, covers 1 % of this area: Jackson Group, undivided
Lithology: clay or mud; sandstone; siltstone
sand dune deposits (Phanerozoic | Cenozoic | Quaternary | Holocene) at surface, covers 0.2 % of this area: sand dune deposits
Lithology: sand; silt
alluvium (Phanerozoic | Cenozoic | Quaternary | Holocene) at surface, covers < 0.1 % of this area: alluvium
Lithology: sand; silt; clay or mud; gravel
dune sand sheet deposits (Phanerozoic | Cenozoic | Quaternary | Holocene) at surface, covers 22 % of this area: dune sand sheet deposits
Lithology: sand; silt
Catahoula Formation and Frio Clay, undivided (Phanerozoic | Cenozoic | Tertiary | Oligocene) at surface, covers 10 % of this area: Catahoula Formation and Frio Clay, undivided
Lithology: clay or mud; mudstone; tuff; sandstone; sand; conglomerate
Goliad Formation (Phanerozoic | Cenozoic | Tertiary | Miocene) at surface, covers 36 % of this area: Goliad Formation
Lithology: clay or mud; sandstone; mudstone; carbonate; limestone; conglomerate