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Geologic units in Matagorda county, Texas

Beaumont Formation, areas predominantly sand (Quaternary; Late Pleistocene) at surface, covers 41 % of this area

Beaumont Formation, areas predominantly sand

Alluvium (Holocene) at surface, covers 31 % of this area

Alluvium

Beaumont Formation, areas predominantly clay (Quaternary; Late Pleistocene) at surface, covers 25 % of this area

Beaumont Formation, areas predominantly clay

Barrier ridge and barrier flat deposts (Quaternary; Holocene) at surface, covers 2 % of this area

Barrier ridge and barrier flat deposts

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

Fill and spoil