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Geologic units in Gregg county, Texas

Queen City Sand (Eocene) at surface, covers 55 % of this area

Queen City Sand

Reklaw Formation (Eocene) at surface, covers 22 % of this area

Reklaw Formation

Alluvium (Holocene) at surface, covers 15 % of this area

Alluvium

Carizzo Sand (Eocene) at surface, covers 4 % of this area

Carizzo Sand

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

Terrace deposits

Weches Formation (Eocene) at surface, covers < 0.1 % of this area

Weches Formation