Geologic units in DeWitt county, Texas

Fleming Formation (Miocene) at surface, covers 27 % of this area

Fleming Formation

Goliad Formation (Miocene) at surface, covers 22 % of this area

Goliad Formation

Oakville Sandstone (Miocene) at surface, covers 21 % of this area

Oakville Sandstone

Willis Formation (Pliocene) at surface, covers 11 % of this area

Willis Formation

Alluvium (Holocene) at surface, covers 8 % of this area

Alluvium

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

Terrace deposits

Lissie Formation (Quaternary; Middle Pleistocene) at surface, covers 3 % of this area

Lissie Formation

Catahoula Formation (Oligocene) at surface, covers 0.5 % of this area

Catahoula Formation