Geologic units in Harrison county, Texas

Wilcox Group, undivided (Paleocene to Eocene) at surface, covers 44 % of this area

Wilcox Group, undivided

Queen City Sand (Eocene) at surface, covers 24 % of this area

Queen City Sand

Reklaw Formation (Eocene) at surface, covers 15 % of this area

Reklaw Formation

Alluvium (Holocene) at surface, covers 11 % of this area

Alluvium

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

Terrace deposits

Carizzo Sand (Eocene) at surface, covers 3 % of this area

Carizzo Sand

Quaternary deposit, undivided (Quaternary) at surface, covers 1 % of this area

Quaternary deposit, undivided

Weches Formation (Eocene) at surface, covers 0.3 % of this area

Weches Formation

Sparta Sand (Eocene) at surface, covers < 0.1 % of this area

Sparta Sand