Skip to main content

Geologic units in Hidalgo county, Texas

Additional scientific data in this geographic area

Goliad Formation (Phanerozoic | Cenozoic | Tertiary | Miocene) at surface, covers 42 % of this area

Goliad Formation

sand sheet deposits (Phanerozoic | Cenozoic | Quaternary | Holocene) at surface, covers 21 % of this area

sand sheet deposits

Lithology: sand; silt

Lissie Formation (Phanerozoic | Cenozoic | Quaternary | Pleistocene-Middle) at surface, covers 11 % of this area

Lissie Formation

Lithology: sand; silt; clay or mud

Alluvium in Rio Grande, subdivided into areas predominantly of sand (Phanerozoic | Cenozoic | Quaternary | Holocene) at surface, covers 10 % of this area

Alluvium in Rio Grande, subdivided into areas predominantly of sand

Lithology: sand; silt

Beaumont Formation, areas predominantly clay (Phanerozoic | Cenozoic | Quaternary | Pleistocene-Late) at surface, covers 5 % of this area

Beaumont Formation, areas predominantly clay

Lithology: clay or mud; silt

dune sand sheet deposits (Phanerozoic | Cenozoic | Quaternary | Holocene) at surface, covers 5 % of this area

dune sand sheet deposits

Lithology: sand; silt

in Rio Grande delta area, clay veneer over meanderbelt sand (Phanerozoic | Cenozoic | Quaternary) at surface, covers 4 % of this area

in Rio Grande delta area, clay veneer over meanderbelt sand

Lithology: clay or mud; sand

Alluvium in Rio Grande, subdivided into areas predominantly of clay (Phanerozoic | Cenozoic | Quaternary | Holocene) at surface, covers 2 % of this area

Alluvium in Rio Grande, subdivided into areas predominantly of clay

Lithology: silt; clay or mud

Terrace deposits (Phanerozoic | Cenozoic | Quaternary | Pleistocene Holocene) at surface, covers 0.3 % of this area

Terrace deposits

clay dune (Phanerozoic | Cenozoic | Quaternary | Holocene) at surface, covers 0.3 % of this area

clay dune

Lithology: sand; silt; clay or mud

alluvium (Phanerozoic | Cenozoic | Quaternary | Holocene) at surface, covers < 0.1 % of this area

alluvium

Lithology: sand; silt; clay or mud; gravel