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Geologic units in Jackson county, Texas

Beaumont Formation, areas predominantly clay (Quaternary; Late Pleistocene) at surface, covers 40 % of this area

Beaumont Formation, areas predominantly clay

Beaumont Formation, areas predominantly sand (Quaternary; Late Pleistocene) at surface, covers 35 % of this area

Beaumont Formation, areas predominantly sand

Lissie Formation (Quaternary; Middle Pleistocene) at surface, covers 16 % of this area

Lissie Formation

Alluvium (Holocene) at surface, covers 8 % of this area

Alluvium

Terrace deposits (Pleistocene and Holocene) at surface, covers 0.8 % of this area

Terrace deposits

Deweyville Formation (Quaternary; Pleistocene and Holocene?) at surface, covers < 0.1 % of this area

Deweyville Formation