Geologic units in San Patricio county, Texas

Beaumont Formation, areas predominantly clay (Quaternary; Late Pleistocene) at surface, covers 41 % 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

Lissie Formation (Quaternary; Middle Pleistocene) at surface, covers 17 % of this area

Lissie Formation

Alluvium (Holocene) at surface, covers 9 % of this area

Alluvium

Deweyville Formation (Quaternary; Pleistocene and Holocene?) at surface, covers 3 % of this area

Deweyville Formation

Barrier island deposits (Quaternary) at surface, covers 3 % of this area

Barrier island deposits

Goliad Formation (Miocene) at surface, covers 0.7 % of this area

Goliad Formation

Fill and spoil (Holocene) at surface, covers 0.4 % of this area

Fill and spoil

Terrace deposits (Pleistocene and Holocene) at surface, covers 0.3 % of this area

Terrace deposits