Palo Pinto Formation
(Pennsylvanian; Missouri Series) at surface, covers 19 % of this area Palo Pinto Formation
Mineral Wells Formation
(Pennsylvanian; Missouri Series) at surface, covers 18 % of this area Mineral Wells Formation
Brazos River Formation
(Pennsylvanian; Des Moines Series) at surface, covers 11 % of this area Brazos River Formation
Winchell Limestone
(Pennsylvanian; Missouri Series) at surface, covers 10 % of this area Winchell Limestone
Wolf Mountain Shale
(Pennsylvanian; Missouri Series) at surface, covers 9 % of this area Wolf Mountain Shale
Mingus Formation
(Pennsylvanian; Des Moines Series) at surface, covers 6 % of this area Mingus Formation
Alluvium
(Holocene) at surface, covers 4 % of this area Alluvium
Terrace deposits
(Pleistocene and Holocene) at surface, covers 1 % of this area Terrace deposits
Lazy Bend Formation
(Pennsylvanian; Des Moines Series) at surface, covers 0.6 % of this area Lazy Bend Formation
Glen Rose Limestone
(Early Cretaceous) at surface, covers < 0.1 % of this area Glen Rose Limestone