Geologic units in Limestone county, Texas

Wills Point Formation (Paleocene) at surface, covers 16 % of this area

Wills Point Formation

Hooper Formation (Paleocene) at surface, covers 15 % of this area

Hooper Formation

Calvert Bluff Formation (Paleocene to Eocene) at surface, covers 12 % of this area

Calvert Bluff Formation

Neylandville and Marlbrook Marls, undivided (Late Cretaceous; Gulfian Series) at surface, covers 10 % of this area

Neylandville and Marlbrook Marls, undivided

Simsboro Formation (Paleocene) at surface, covers 9 % of this area

Simsboro Formation

Kemp clay (Late Cretaceous; Gulfian Series) at surface, covers 8 % of this area

Kemp clay

Kincaid Formation (Paleocene) at surface, covers 8 % of this area

Kincaid Formation

Alluvium (Holocene) at surface, covers 6 % of this area

Alluvium

Wolfe City Formation (Late Cretaceous; Gulfian Series) at surface, covers 5 % of this area

Wolfe City Formation

Nacatoch Sand (Late Cretaceous; Gulfian Series) at surface, covers 5 % of this area

Nacatoch Sand

Pecan Gap Chalk (Late Cretaceous; Gulfian Series) at surface, covers 4 % of this area

Pecan Gap Chalk

Terrace deposits (Pleistocene and Holocene) at surface, covers 1 % of this area

Terrace deposits

High gravel deposits (Pleistocene) at surface, covers 0.3 % of this area

High gravel deposits

Kemp clay and Corsicana Marl, undivided (Late Cretaceous; Gulfian Series) at surface, covers 0.2 % of this area

Kemp clay and Corsicana Marl, undivided

Quaternary deposit, undivided (Quaternary) at surface, covers < 0.1 % of this area

Quaternary deposit, undivided