Geologic units in Calhoun county, Texas

Beaumont Formation, areas predominantly clay (Quaternary; Late Pleistocene) at surface, covers 32 % of this area

Beaumont Formation, areas predominantly clay

Beaumont Formation, areas predominantly sand (Quaternary; Late Pleistocene) at surface, covers 26 % of this area

Beaumont Formation, areas predominantly sand

Barrier island deposits (Quaternary) at surface, covers 19 % of this area

Barrier island deposits

Alluvium (Holocene) at surface, covers 16 % of this area

Alluvium

Barrier ridge and barrier flat deposts (Quaternary; Holocene) at surface, covers 6 % of this area

Barrier ridge and barrier flat deposts

Fill and spoil (Holocene) at surface, covers 0.6 % of this area

Fill and spoil

Deweyville Formation (Quaternary; Pleistocene and Holocene?) at surface, covers 0.6 % of this area

Deweyville Formation

Lissie Formation (Quaternary; Middle Pleistocene) at surface, covers < 0.1 % of this area

Lissie Formation