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Mineral Resources > Online Spatial Data > Geology > by state > Arkansas Geology

Geologic units in Clay county, Arkansas

[Additional scientific data in this geographic area]

Alluvium and terrace deposits (Phanerozoic | Cenozoic | Quaternary | Pleistocene Holocene) at surface, covers < 0.1 % of this area

Alluvium and terrace deposits - Alluvial deposits of present streams and on one or more terrace levels

Lithology: alluvium; alluvial terrace

Wilcox Group (Phanerozoic | Cenozoic | Tertiary | Eocene-Early) at surface, covers 0.7 % of this area

Wilcox Group

Lithology: sand; silt; clay or mud; gravel; coal

Dune sand (Phanerozoic | Cenozoic | Quaternary | Pleistocene-Late) at surface, covers 10 % of this area

Dune sand - Deposited mostly on terrace deposits of the second level. Younger than some terrace deposits, older than others

Lithology: dune sand

Sand and clay (Phanerozoic | Mesozoic | Cretaceous) at surface, covers < 0.1 % of this area

Sand and clay

Lithology: sand; clay or mud

Terrace deposits (Phanerozoic | Cenozoic | Quaternary | Pleistocene-Late) at surface, covers 52 % of this area

Terrace deposits - Alluvial deposits on one or more terrace levels

Lithology: alluvial terrace

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

HOLOCENE SERIES - Alluvium - clay, silt, sand, and gravel

Lithology: clay or mud; silt; sand; gravel

Alluvium - Alluvial deposits of local streams or of overbank flow of major streams (Phanerozoic | Cenozoic | Quaternary | Holocene) at surface, covers 20 % of this area

Alluvial deposits of local streams or of overbank flow of major streams - In some areas includes deposits in abandoned meanders of major streams

Lithology: alluvium

Silt and sand (Phanerozoic | Cenozoic | Quaternary | Pleistocene-Early) at surface, covers 17 % of this area

Silt and sand - Contains lenses of gravel and clay

Lithology: silt; sand; gravel; clay or mud