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Geologic units in Gregg county, Texas

Carizzo Sand (Phanerozoic | Cenozoic | Tertiary | Eocene) at surface, covers 41 % of this area

Carizzo Sand

Lithology: sandstone

Terrace deposits (Phanerozoic | Cenozoic | Quaternary | Pleistocene Holocene) at surface, covers 41 % of this area

Terrace deposits

Reklaw Formation (Phanerozoic | Cenozoic | Tertiary | Eocene) at surface, covers 8 % of this area

Reklaw Formation

Lithology: sandstone; clay or mud

alluvium (Phanerozoic | Cenozoic | Quaternary | Holocene) at surface, covers 6 % of this area

alluvium

Lithology: sand; silt; clay or mud; gravel

Queen City Sand (Phanerozoic | Cenozoic | Tertiary | Eocene) at surface, covers 2 % of this area

Queen City Sand

Weches Formation (Phanerozoic | Cenozoic | Tertiary | Eocene) at surface, covers 0.4 % of this area

Weches Formation

Lithology: sand; clay or mud