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Geologic units in DeWitt county, Texas

Oakville Sandstone (Phanerozoic | Cenozoic | Tertiary | Miocene) at surface, covers 36 % of this area

Oakville Sandstone

Lithology: sandstone; clay or mud

Willis Formation (Phanerozoic | Cenozoic | Tertiary | Pliocene) at surface, covers 19 % of this area

Willis Formation

Lithology: clay or mud; silt; sand; gravel

alluvium (Phanerozoic | Cenozoic | Quaternary | Holocene) at surface, covers 13 % of this area

alluvium

Lithology: sand; silt; clay or mud; gravel

Terrace deposits (Phanerozoic | Cenozoic | Quaternary | Pleistocene Holocene) at surface, covers 12 % of this area

Terrace deposits

Goliad Formation (Phanerozoic | Cenozoic | Tertiary | Miocene) at surface, covers 11 % of this area

Goliad Formation

Lissie Formation (Phanerozoic | Cenozoic | Quaternary | Pleistocene-Middle) at surface, covers 6 % of this area

Lissie Formation

Lithology: sand; silt; clay or mud

Fleming Formation (Phanerozoic | Cenozoic | Tertiary | Miocene) at surface, covers 3 % of this area

Fleming Formation

Lithology: clay or mud; sandstone

Catahoula Formation (Phanerozoic | Cenozoic | Tertiary | Oligocene) at surface, covers 0.2 % of this area

Catahoula Formation