Glen Rose Limestone
(Early Cretaceous) at surface, covers 35 % of this area Glen Rose Limestone
Paluxy Sand
(Early Cretaceous) at surface, covers 25 % of this area Paluxy Sand
Walnut Clay
(Early Cretaceous) at surface, covers 17 % of this area Walnut Clay
Terrace deposits
(Pleistocene and Holocene) at surface, covers 6 % of this area Terrace deposits
Alluvium
(Holocene) at surface, covers 5 % of this area Alluvium