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Geologic units in Bastrop county, Texas

Wilcox Group, undivided (Paleocene to Eocene) at surface, covers 14 % of this area

Wilcox Group, undivided

Terrace deposits (Pleistocene and Holocene) at surface, covers 13 % of this area

Terrace deposits

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

Calvert Bluff Formation

Queen City Sand (Eocene) at surface, covers 9 % of this area

Queen City Sand

Reklaw Formation (Eocene) at surface, covers 8 % of this area

Reklaw Formation

Carizzo Sand (Eocene) at surface, covers 6 % of this area

Carizzo Sand

Cook Mountain Formation (Eocene) at surface, covers 6 % of this area

Cook Mountain Formation

Hooper Formation (Paleocene) at surface, covers 6 % of this area

Hooper Formation

Sparta Sand (Eocene) at surface, covers 6 % of this area

Sparta Sand

Alluvium (Holocene) at surface, covers 4 % of this area

Alluvium

Simsboro Formation (Paleocene) at surface, covers 4 % of this area

Simsboro Formation

Midway Group, undivided (Paleocene) at surface, covers 4 % of this area

Midway Group, undivided

High gravel deposits (Pleistocene) at surface, covers 3 % of this area

High gravel deposits

Weches Formation (Eocene) at surface, covers 2 % of this area

Weches Formation

Yegua Formation (Middle Eocene) at surface, covers 1 % of this area

Yegua Formation

Navarro Group and Marlbrook Marl, undivided (Late Cretaceous; Gulfian Series) at surface, covers 1 % of this area

Navarro Group and Marlbrook Marl, undivided

Willis Formation (Pliocene) at surface, covers 0.3 % of this area

Willis Formation

Navarro and Taylor Groups, undivided (Late Cretaceous; Gulfian Series) at surface, covers < 0.1 % of this area

Navarro and Taylor Groups, undivided