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Geologic units in Harris county, Texas

Beaumont Formation, areas predominantly sand (Phanerozoic | Cenozoic | Quaternary | Pleistocene-Late) at surface, covers 65 % of this area

Beaumont Formation, areas predominantly sand

Lithology: sand; silt; clay or mud; gravel

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

alluvium

Lithology: sand; silt; clay or mud; gravel

Deweyville Formation (Phanerozoic | Cenozoic | Quaternary | Pleistocene Holocene (?)) at surface, covers 4 % of this area

Deweyville Formation

Lithology: sand; silt; clay or mud

Beaumont Formation, areas predominantly clay (Phanerozoic | Cenozoic | Quaternary | Pleistocene-Late) at surface, covers 3 % of this area

Beaumont Formation, areas predominantly clay

Lithology: clay or mud; silt

Lissie Formation (Phanerozoic | Cenozoic | Quaternary | Pleistocene-Middle) at surface, covers 3 % of this area

Lissie Formation

Lithology: sand; silt; clay or mud

fill and spoil (Phanerozoic | Cenozoic | Quaternary | Holocene) at surface, covers 2 % of this area

fill and spoil

Lithology: sand; silt; clay or mud

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

Terrace deposits