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Geologic units in Waller county, Texas

Terrace deposits (Phanerozoic | Cenozoic | Quaternary | Pleistocene Holocene) at surface, covers 3 % of this area
Terrace deposits
Lithology: terrace; sand; gravel; silt; clay or mud
Lissie Formation (Phanerozoic | Cenozoic | Quaternary | Pleistocene-Middle) at surface, covers 36 % of this area
Lissie Formation
Lithology: sand; silt; clay or mud
Beaumont Formation, areas predominantly clay (Phanerozoic | Cenozoic | Quaternary | Pleistocene-Late) at surface, covers < 0.1 % of this area
Beaumont Formation, areas predominantly clay
Lithology: clay or mud; silt
alluvium (Phanerozoic | Cenozoic | Quaternary | Holocene) at surface, covers 19 % of this area
alluvium
Lithology: sand; silt; clay or mud; gravel
Willis Formation (Phanerozoic | Cenozoic | Tertiary | Pliocene) at surface, covers 43 % of this area
Willis Formation
Lithology: clay or mud; silt; sand; gravel
Fleming Formation (Phanerozoic | Cenozoic | Tertiary | Miocene) at surface, covers < 0.1 % of this area
Fleming Formation
Lithology: clay or mud; sandstone

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