Geologic units in Bosque county, Texas

Walnut Clay (Early Cretaceous) at surface, covers 33 % of this area

Walnut Clay

Undivided part Fredericksberg Group (Early Cretaceous) at surface, covers 28 % of this area

Undivided part Fredericksberg Group

Lower part of Washita Group (Early Cretaceous; Comanchean Series) at surface, covers 15 % of this area

Lower part of Washita Group

Pawpaw Formation and upper limestone unit of Weno Formation, undivided (Early Cretaceous) at surface, covers 8 % of this area

Pawpaw Formation and upper limestone unit of Weno Formation, undivided

Paluxy Sand (Early Cretaceous) at surface, covers 6 % of this area

Paluxy Sand

Alluvium (Holocene) at surface, covers 3 % of this area

Alluvium

Terrace deposits (Pleistocene and Holocene) at surface, covers 3 % of this area

Terrace deposits

Glen Rose Limestone (Early Cretaceous) at surface, covers 1 % of this area

Glen Rose Limestone

Grayson Marl and Main Street Limestone, undivided (Early Late Cretaceous and Late Early Cretaceous) at surface, covers 0.6 % of this area

Grayson Marl and Main Street Limestone, undivided

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

Undivided part of Washita Group