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Geologic units in Duval county, Texas

Goliad Formation (Phanerozoic | Cenozoic | Tertiary | Miocene) at surface, covers 59 % of this area

Goliad Formation

Fleming Formation and Oakville Sandstone, undivided (Phanerozoic | Cenozoic | Tertiary | Miocene) at surface, covers 17 % of this area

Fleming Formation and Oakville Sandstone, undivided

Lithology: clay or mud; sandstone

alluvium (Phanerozoic | Cenozoic | Quaternary | Holocene) at surface, covers 9 % of this area

alluvium

Lithology: sand; silt; clay or mud; gravel

Frio Clay (Phanerozoic | Cenozoic | Tertiary | Oligocene) at surface, covers 7 % of this area

Frio Clay

Lithology: clay or mud

sand sheet deposits (Phanerozoic | Cenozoic | Quaternary | Holocene) at surface, covers 2 % of this area

sand sheet deposits

Lithology: sand; silt

Quaternary deposit, undivided (Phanerozoic | Cenozoic | Quaternary) at surface, covers 2 % of this area

sand, silt, clay, and gravel. locally indurated with calcium carbonate (caliche); includes point bar, natural levee, stream channel, sand dune, terrace, alluvial fan, landslide bolson and playa deposits

Terrace deposits (Phanerozoic | Cenozoic | Quaternary | Pleistocene Holocene) at surface, covers 2 % of this area

Terrace deposits

Lissie Formation (Phanerozoic | Cenozoic | Quaternary | Pleistocene-Middle) at surface, covers 2 % of this area

Lissie Formation

Lithology: sand; silt; clay or mud

Jackson Group, undivided (Phanerozoic | Cenozoic | Tertiary | Eocene Oligocene) at surface, covers 0.1 % of this area

Jackson Group, undivided