Goliad Formation
(Miocene) at surface, covers 23 % of this area Goliad Formation
Terrace deposits
(Pleistocene and Holocene) at surface, covers 12 % of this area Terrace deposits
Alluvium
(Holocene) at surface, covers 6 % of this area Alluvium
Whitsett Formation
(Oligocene and Eocene) at surface, covers 4 % of this area Whitsett Formation
Lissie Formation
(Quaternary; Middle Pleistocene) at surface, covers 3 % of this area Lissie Formation
Frio Clay
(Oligocene) at surface, covers 3 % of this area Frio Clay
Deweyville Formation
(Quaternary; Pleistocene and Holocene?) at surface, covers 2 % of this area Deweyville Formation
Uvalde Gravel
(Pliocene to Pleistocene) at surface, covers 0.4 % of this area Uvalde Gravel