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Geologic units in Hamilton county, Texas

Paluxy Sand and Glen Rose Limestone, undivided (Phanerozoic | Mesozoic | Cretaceous-Early) at surface, covers 40 % of this area

Paluxy Sand and Glen Rose Limestone, undivided

alluvium (Phanerozoic | Cenozoic | Quaternary | Holocene) at surface, covers 28 % of this area

alluvium

Lithology: sand; silt; clay or mud; gravel

undivided part Fredericksberg Group (Phanerozoic | Mesozoic | Cretaceous-Early) at surface, covers 12 % of this area

undivided part Fredericksberg Group

lower part of Washita Group (Phanerozoic | Mesozoic | Cretaceous-Early [Comanchean]) at surface, covers 9 % of this area

lower part of Washita Group

Lithology: limestone; mudstone

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

Terrace deposits

Walnut Clay (Phanerozoic | Mesozoic | Cretaceous-Early) at surface, covers 4 % of this area

Walnut Clay

Twin Mountains Formation (Phanerozoic | Mesozoic | Cretaceous-Early) at surface, covers 2 % of this area

Twin Mountains Formation