Antlers Sand
(Early Cretaceous) at surface, covers 37 % of this area Antlers Sand
Harpersville Formation
(Pennsylvanian; Virgil Series) at surface, covers 5 % of this area Harpersville Formation
Moran Formation
(Permian; Wolfcamp Series) at surface, covers 5 % of this area Moran Formation
Wolf Mountain Shale
(Pennsylvanian; Missouri Series) at surface, covers 5 % of this area Wolf Mountain Shale
Pueblo Formation
(Permian; Wolfcamp Series) at surface, covers 4 % of this area Pueblo Formation
Magdalena Formation
(Pennsylvanian to Permian?) at surface, covers 4 % of this area Magdalena Formation
Brazos River Formation
(Pennsylvanian; Des Moines Series) at surface, covers 3 % of this area Brazos River Formation
Winchell Limestone
(Pennsylvanian; Missouri Series) at surface, covers 3 % of this area Winchell Limestone
Mineral Wells Formation
(Pennsylvanian; Missouri Series) at surface, covers 3 % of this area Mineral Wells Formation
Palo Pinto Formation
(Pennsylvanian; Missouri Series) at surface, covers 2 % of this area Palo Pinto Formation
Alluvium
(Holocene) at surface, covers 2 % of this area Alluvium
Mingus Formation
(Pennsylvanian; Des Moines Series) at surface, covers 0.7 % of this area Mingus Formation
Glen Rose Limestone
(Early Cretaceous) at surface, covers 0.6 % of this area Glen Rose Limestone
Paluxy Sand
(Early Cretaceous) at surface, covers 0.5 % of this area Paluxy Sand
Terrace deposits
(Pleistocene and Holocene) at surface, covers 0.2 % of this area Terrace deposits
Sedwick Formation
(Permian; Wolfcamp Series) at surface, covers 0.2 % of this area Sedwick Formation
Lingos Formation
(Middle (?) Pleistocene to Recent) at surface, covers < 0.1 % of this area Lingos Formation
