Glen Rose Limestone
(Early Cretaceous) at surface, covers 41 % of this area Glen Rose Limestone
Paluxy Sand
(Early Cretaceous) at surface, covers 24 % of this area Paluxy Sand
Walnut Clay
(Early Cretaceous) at surface, covers 6 % of this area Walnut Clay
Terrace deposits
(Pleistocene and Holocene) at surface, covers 6 % of this area Terrace deposits
Alluvium
(Holocene) at surface, covers 3 % of this area Alluvium
Lazy Bend Formation
(Pennsylvanian; Des Moines Series) at surface, covers 2 % of this area Lazy Bend Formation
Duck Creek Limestone
(Early Cretaceous; Comanchean Series) at surface, covers 1 % of this area Duck Creek Limestone
Kiamichi Formation
(Early Cretaceous; Comanchean Series) at surface, covers < 0.1 % of this area Kiamichi Formation