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Geologic units in Tom Green county, Texas

Quaternary deposit, undivided (Phanerozoic | Cenozoic | Quaternary) at surface, covers 9 % of this area
sand, silt, clay, and gravel. locally indurated with calcium carbonate (caliche); includes point bar, natural levee, stream channel, sand dune, terrace, alluvial fan, landslide bolson and playa deposits
Lithology: sand ; silt ; clay or mud; gravel; carbonate
Terrace deposits (Phanerozoic | Cenozoic | Quaternary | Pleistocene Holocene) at surface, covers 0.2 % of this area
Terrace deposits
Lithology: terrace; sand; gravel; silt; clay or mud
Lingos Formation (Phanerozoic | Cenozoic | Quaternary | Pleistocene-Middle(?) Pleistocene-Late(?) Holocene) at surface, covers 2 % of this area
Lingos Formation
Lithology: sand; gravel; clay or mud; silt
high gravel deposits (Phanerozoic | Cenozoic | Quaternary | Pleistocene) at surface, covers < 0.1 % of this area
high gravel deposits
Lithology: gravel; silt; sand
alluvium (Phanerozoic | Cenozoic | Quaternary | Holocene) at surface, covers 3 % of this area
alluvium
Lithology: sand; silt; clay or mud; gravel
Whitehorse Group, undivided (Phanerozoic | Paleozoic | Permian [Guadalupe]) at surface, covers < 0.1 % of this area
Whitehorse Group, undivided
Lithology: sandstone; shale; evaporite
San Angelo Formation (Phanerozoic | Paleozoic | Permian [Guadalupe]) at surface, covers 2 % of this area
San Angelo Formation
Lithology: mudstone; siltstone; evaporite
Ogallala Formation (Phanerozoic | Cenozoic | Tertiary | Pliocene Miocene) at surface, covers 0.3 % of this area
Ogallala Formation
Lithology: sand; silt; clay or mud; gravel; carbonate
Clear Fork Group (Phanerozoic | Paleozoic | Permian [Leonard]) at surface, covers 0.5 % of this area
Clear Fork Group
Lithology: mudstone; sandstone; dolostone (dolomite); siltstone; evaporite
Blaine Formation (Phanerozoic | Paleozoic | Permian [Guadalupe]) at surface, covers 0.9 % of this area
Blaine Formation
Lithology: mudstone; evaporite; dolostone (dolomite); sandstone
Edwards Limestone (Phanerozoic | Mesozoic | Cretaceous-Early) at surface, covers < 0.1 % of this area
Edwards Limestone
Lithology: limestone; dolostone (dolomite); chert
Buda Limestone (Phanerozoic | Mesozoic | Cretaceous-Early) at surface, covers < 0.1 % of this area
Buda Limestone
Lithology: limestone
Antlers Sand (Phanerozoic | Mesozoic | Cretaceous-Early) at surface, covers 2 % of this area
Antlers Sand
Lithology: sand; clay or mud; conglomerate; sandstone; claystone

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