Geologic units in Madison county, Texas

high gravel deposits (Phanerozoic | Cenozoic | Quaternary | Pleistocene) at surface, covers 2 % of this area: high gravel deposits
Lithology: gravel; silt; sand
alluvium (Phanerozoic | Cenozoic | Quaternary | Holocene) at surface, covers 17 % of this area: alluvium
Lithology: sand; silt; clay or mud; gravel
Cook Mountain Formation (Phanerozoic | Cenozoic | Tertiary | Eocene) at surface, covers 15 % of this area: Cook Mountain Formation
Lithology: clay or mud; sandstone; coal
Deweyville Formation (Phanerozoic | Cenozoic | Quaternary | Pleistocene Holocene (?)) at surface, covers 2 % of this area: Deweyville Formation
Lithology: sand; silt; clay or mud
Wellborn Formation (Phanerozoic | Cenozoic | Tertiary | Eocene) at surface, covers < 0.1 % of this area: Wellborn Formation
Lithology: sandstone; sand ; clay or mud; coal
Yegua Formation (Phanerozoic | Cenozoic | Tertiary | Eocene-Middle) at surface, covers 61 % of this area: Yegua Formation
Lithology: clay or mud; sandstone; limestone; coal
Terrace deposits (Phanerozoic | Cenozoic | Quaternary | Pleistocene Holocene) at surface, covers 4 % of this area: Terrace deposits
Lithology: terrace; sand; gravel; silt; clay or mud