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Geologic units in Smith county, Texas

Wilcox Group, undivided (Phanerozoic | Cenozoic | Tertiary | Paleocene Eocene) at surface, covers < 0.1 % of this area
Wilcox Group, undivided
Lithology: fine-grained mixed clastic; coal; sand; clay or mud
Carizzo Sand (Phanerozoic | Cenozoic | Tertiary | Eocene) at surface, covers 1 % of this area
Carizzo Sand
Lithology: sandstone
alluvium (Phanerozoic | Cenozoic | Quaternary | Holocene) at surface, covers 6 % of this area
alluvium
Lithology: sand; silt; clay or mud; gravel
Reklaw Formation (Phanerozoic | Cenozoic | Tertiary | Eocene) at surface, covers 4 % of this area
Reklaw Formation
Lithology: sandstone; clay or mud
Weches Formation (Phanerozoic | Cenozoic | Tertiary | Eocene) at surface, covers 13 % of this area
Weches Formation
Lithology: sand; clay or mud
Queen City Sand (Phanerozoic | Cenozoic | Tertiary | Eocene) at surface, covers 48 % of this area
Queen City Sand
Lithology: sandstone; siltstone; clay or mud; sand
Reklaw Formation, Carrizo Sand, and Wilcox and Midway Groups, undivided (Phanerozoic | Cenozoic | Tertiary | Paleocene Eocene) at surface, covers 0.2 % of this area
Reklaw Formation, Carrizo Sand, and Wilcox and Midway Groups, undivided
Lithology: fine-grained mixed clastic; coal
Sparta Sand (Phanerozoic | Cenozoic | Tertiary | Eocene) at surface, covers 25 % of this area
Sparta Sand
Lithology: sand; clay or mud; silt; sandstone; coal
Terrace deposits (Phanerozoic | Cenozoic | Quaternary | Pleistocene Holocene) at surface, covers 0.2 % of this area
Terrace deposits
Lithology: terrace; sand; gravel; silt; clay or mud

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Page Last modified: 11:25 on 07-Jan-2014