Geologic units in Hood county, Texas

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

Twin Mountains Formation (Early Cretaceous) at surface, covers 11 % of this area

Twin Mountains Formation

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

Undivided part Fredericksberg Group (Early Cretaceous) at surface, covers 4 % of this area

Undivided part Fredericksberg Group

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

Quaternary deposit, undivided (Quaternary) at surface, covers 2 % of this area

Quaternary deposit, undivided

Duck Creek Limestone (Early Cretaceous; Comanchean Series) at surface, covers 1 % of this area

Duck Creek Limestone

Undivided part of Washita Group (Early Cretaceous; Comanchean Series) at surface, covers 0.3 % of this area

Undivided part of Washita Group

Unnamed Pennsylvanian rocks (Pennsylvanian) at surface, covers 0.2 % of this area

Unnamed Pennsylvanian rocks

Kiamichi Formation (Early Cretaceous; Comanchean Series) at surface, covers < 0.1 % of this area

Kiamichi Formation