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Geologic units in Willacy county, Texas

[Additional scientific data in this geographic area]

clay dune (Phanerozoic | Cenozoic | Quaternary | Holocene) at surface, covers 2 % of this area
clay dune
Lithology: sand; silt; clay or mud
dune sand sheet deposits (Phanerozoic | Cenozoic | Quaternary | Holocene) at surface, covers 2 % of this area
dune sand sheet deposits
Lithology: sand; silt
alluvium (Phanerozoic | Cenozoic | Quaternary | Holocene) at surface, covers 3 % of this area
alluvium
Lithology: sand; silt; clay or mud; gravel
Lissie Formation (Phanerozoic | Cenozoic | Quaternary | Pleistocene-Middle) at surface, covers 3 % of this area
Lissie Formation
Lithology: sand; silt; clay or mud
in Rio Grande delta area, clay veneer over meanderbelt sand (Phanerozoic | Cenozoic | Quaternary) at surface, covers 10 % of this area
in Rio Grande delta area, clay veneer over meanderbelt sand
Lithology: clay or mud; sand
Goliad Formation (Phanerozoic | Cenozoic | Tertiary | Miocene) at surface, covers 6 % of this area
Goliad Formation
Lithology: clay or mud; sandstone; mudstone; carbonate; limestone; conglomerate
Beaumont Formation, areas predominantly clay (Phanerozoic | Cenozoic | Quaternary | Pleistocene-Late) at surface, covers 16 % of this area
Beaumont Formation, areas predominantly clay
Lithology: clay or mud; silt
Beaumont Formation, areas predominantly sand (Phanerozoic | Cenozoic | Quaternary | Pleistocene-Late) at surface, covers 35 % of this area
Beaumont Formation, areas predominantly sand
Lithology: sand; silt; clay or mud; gravel
barrier ridge and barrier flat deposts (Phanerozoic | Cenozoic | Quaternary | Holocene) at surface, covers 0.6 % of this area
barrier ridge and barrier flat deposts
Lithology: sand; silt; clay or mud
fill and spoil (Phanerozoic | Cenozoic | Quaternary | Holocene) at surface, covers < 0.1 % of this area
fill and spoil
Lithology: sand; silt; clay or mud
sand sheet deposits (Phanerozoic | Cenozoic | Quaternary | Holocene) at surface, covers 20 % of this area
sand sheet deposits
Lithology: sand; silt
sand dune deposits (Phanerozoic | Cenozoic | Quaternary | Holocene) at surface, covers 0.8 % of this area
sand dune deposits
Lithology: sand; silt

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