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Geologic units in Newton county, Texas

Fleming Formation (Miocene) at surface, covers 22 % of this area

Fleming Formation

Willis Formation (Pliocene) at surface, covers 21 % of this area

Willis Formation

Beaumont Formation, areas predominantly sand (Quaternary; Late Pleistocene) at surface, covers 16 % of this area

Beaumont Formation, areas predominantly sand

Lissie Formation (Quaternary; Middle Pleistocene) at surface, covers 13 % of this area

Lissie Formation

Deweyville Formation (Quaternary; Pleistocene and Holocene?) at surface, covers 11 % of this area

Deweyville Formation

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

Alluvium

Catahoula Formation (Oligocene) at surface, covers 6 % of this area

Catahoula Formation

Beaumont Formation, areas predominantly clay (Quaternary; Late Pleistocene) at surface, covers 2 % of this area

Beaumont Formation, areas predominantly clay

Terrace deposits (Pleistocene and Holocene) at surface, covers 0.4 % of this area

Terrace deposits

Alluvium (Holocene) at surface, covers 0.2 % of this area

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

Nash Creek Formation (Oligocene) at surface, covers 0.2 % of this area

Nash Creek Formation