Geologic units in Robertson county, Texas

Calvert Bluff Formation (Paleocene to Eocene) at surface, covers 27 % of this area

Calvert Bluff Formation

Alluvium (Holocene) at surface, covers 18 % of this area

Alluvium

Queen City Sand (Eocene) at surface, covers 12 % of this area

Queen City Sand

Sparta Sand (Eocene) at surface, covers 11 % of this area

Sparta Sand

Carizzo Sand (Eocene) at surface, covers 7 % of this area

Carizzo Sand

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

Cook Mountain Formation

Reklaw Formation (Eocene) at surface, covers 5 % of this area

Reklaw Formation

Simsboro Formation (Paleocene) at surface, covers 5 % of this area

Simsboro Formation

Terrace deposits (Pleistocene and Holocene) at surface, covers 4 % of this area

Terrace deposits

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

Weches Formation

Hooper Formation (Paleocene) at surface, covers 1 % of this area

Hooper Formation

Wills Point Formation (Paleocene) at surface, covers 0.4 % of this area

Wills Point Formation

High gravel deposits (Pleistocene) at surface, covers 0.4 % of this area

High gravel deposits

Wilcox Group, undivided (Paleocene to Eocene) at surface, covers < 0.1 % of this area

Wilcox Group, undivided