Geologic units in Willacy county, Texas

Additional scientific data in this geographic area

Beaumont Formation, areas predominantly sand (Quaternary; Late Pleistocene) at surface, covers 36 % of this area

Beaumont Formation, areas predominantly sand

Sand sheet deposits (Holocene) at surface, covers 21 % of this area

Sand sheet deposits

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

Beaumont Formation, areas predominantly clay

In Rio Grande delta area, clay veneer over meanderbelt sand (Quaternary) at surface, covers 10 % of this area

In Rio Grande delta area, clay veneer over meanderbelt sand

Goliad Formation (Miocene) at surface, covers 6 % of this area

Goliad Formation

Lissie Formation (Quaternary; Middle Pleistocene) at surface, covers 3 % of this area

Lissie Formation

Alluvium (Holocene) at surface, covers 3 % of this area

Alluvium

Dune sand sheet deposits (Holocene) at surface, covers 2 % of this area

Dune sand sheet deposits

Clay dune (Holocene) at surface, covers 2 % of this area

Clay dune

Sand dune deposits (Holocene) at surface, covers 0.8 % of this area

Sand dune deposits

Barrier ridge and barrier flat deposts (Quaternary; Holocene) at surface, covers 0.6 % of this area

Barrier ridge and barrier flat deposts

Fill and spoil (Holocene) at surface, covers < 0.1 % of this area

Fill and spoil