Geologic units in Orange county, Texas

Beaumont Formation, areas predominantly sand (Quaternary; Late Pleistocene) at surface, covers 45 % of this area

Beaumont Formation, areas predominantly sand

Beaumont Formation, areas predominantly clay (Quaternary; Late Pleistocene) at surface, covers 20 % of this area

Beaumont Formation, areas predominantly clay

Alluvium (Holocene) at surface, covers 19 % of this area

Alluvium

Deweyville Formation (Quaternary; Pleistocene and Holocene?) at surface, covers 10 % of this area

Deweyville Formation

Barrier island deposits (Quaternary) at surface, covers 4 % of this area

Barrier island deposits

Fill and spoil (Holocene) at surface, covers 0.9 % of this area

Fill and spoil

Deweyville Formation with higher level? (Quaternary; Pleistocene and Holocene?) at surface, covers 0.2 % of this area

Deweyville Formation with higher level?

Alluvium (Holocene) at surface, covers < 0.1 % of this area

Gray to brownish gray clay and silty clay, reddish brown in the Red River Valley, some sand and gravel locally.

Chenier Plain, Saline Marsh (Holocene) at surface, covers < 0.1 % of this area

Gray to brown to black clay and silt of moderate organic content.