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Geologic units in Smith county, Texas

Queen City Sand (Phanerozoic | Cenozoic | Tertiary | Eocene) at surface, covers 61 % of this area

Queen City Sand

Sparta Sand (Phanerozoic | Cenozoic | Tertiary | Eocene) at surface, covers 31 % of this area

Sparta Sand

Weches Formation (Phanerozoic | Cenozoic | Tertiary | Eocene) at surface, covers 5 % of this area

Weches Formation

Lithology: sand; clay or mud

Reklaw Formation (Phanerozoic | Cenozoic | Tertiary | Eocene) at surface, covers 1 % of this area

Reklaw Formation

Lithology: sandstone; clay or mud

alluvium (Phanerozoic | Cenozoic | Quaternary | Holocene) at surface, covers 0.5 % of this area

alluvium

Lithology: sand; silt; clay or mud; gravel

Reklaw Formation, Carrizo Sand, and Wilcox and Midway Groups, undivided (Phanerozoic | Cenozoic | Tertiary | Paleocene Eocene) at surface, covers 0.3 % of this area

Reklaw Formation, Carrizo Sand, and Wilcox and Midway Groups, undivided

Terrace deposits (Phanerozoic | Cenozoic | Quaternary | Pleistocene Holocene) at surface, covers 0.2 % of this area

Terrace deposits

Carizzo Sand (Phanerozoic | Cenozoic | Tertiary | Eocene) at surface, covers < 0.1 % of this area

Carizzo Sand

Lithology: sandstone