Geologic units in Karnes county, Texas

Catahoula Formation (Oligocene) at surface, covers 25 % of this area

Catahoula Formation

Oakville Sandstone (Miocene) at surface, covers 20 % of this area

Oakville Sandstone

Fleming Formation (Miocene) at surface, covers 13 % of this area

Fleming Formation

Alluvium (Holocene) at surface, covers 9 % of this area

Alluvium

Whitsett Formation (Oligocene and Eocene) at surface, covers 9 % of this area

Whitsett Formation

Terrace deposits (Pleistocene and Holocene) at surface, covers 8 % of this area

Terrace deposits

Manning Formation (Eocene) at surface, covers 5 % of this area

Manning Formation

Yegua Formation (Middle Eocene) at surface, covers 2 % of this area

Yegua Formation

Goliad Formation (Miocene) at surface, covers 2 % of this area

Goliad Formation

Fleming Formation and Oakville Sandstone, undivided (Miocene) at surface, covers 2 % of this area

Fleming Formation and Oakville Sandstone, undivided

Cadell Formation (Eocene) at surface, covers 2 % of this area

Cadell Formation

Wellborn Formation (Eocene) at surface, covers 1 % of this area

Wellborn Formation

Leona Formation (Pleistocene) at surface, covers 0.1 % of this area

Leona Formation