Geologic units in Trinity county, Texas

Manning Formation (Eocene) at surface, covers 19 % of this area

Manning Formation

Yegua Formation (Middle Eocene) at surface, covers 19 % of this area

Yegua Formation

Cadell Formation (Eocene) at surface, covers 15 % of this area

Cadell Formation

Whitsett Formation (Oligocene and Eocene) at surface, covers 15 % of this area

Whitsett Formation

Alluvium (Holocene) at surface, covers 12 % of this area

Alluvium

Catahoula Formation (Oligocene) at surface, covers 8 % of this area

Catahoula Formation

Wellborn Formation (Eocene) at surface, covers 7 % of this area

Wellborn Formation

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

Beaumont Formation, areas predominantly sand

Terrace deposits (Pleistocene and Holocene) at surface, covers 2 % of this area

Terrace deposits

Fleming Formation (Miocene) at surface, covers 0.5 % of this area

Fleming Formation

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

Deweyville Formation