Lissie Formation
(Quaternary; Middle Pleistocene) at surface, covers 44 % of this area Lissie Formation
Silt sheet
(Holocene) at surface, covers 20 % of this area Silt sheet
Goliad Formation
(Miocene) at surface, covers 13 % of this area Goliad Formation
Alluvium
(Holocene) at surface, covers 5 % of this area Alluvium
Deweyville Formation
(Quaternary; Pleistocene and Holocene?) at surface, covers 0.5 % of this area Deweyville Formation
Terrace deposits
(Pleistocene and Holocene) at surface, covers 0.5 % of this area Terrace deposits