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Geologic units in Clay county, Arkansas

Additional scientific data in this geographic area

Terrace deposits (Late Pleistocene) at surface, covers 52 % of this area

Alluvial deposits on one or more terrace levels

Alluvium - Alluvial deposits of local streams or of overbank flow of major streams (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

Silt and sand (Early Pleistocene) at surface, covers 17 % of this area

Contains lenses of gravel and clay

Dune sand (Late Pleistocene) at surface, covers 10 % of this area

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

Wilcox Group (Early Eocene) at surface, covers 0.7 % of this area

Wilcox Group

Alluvium and terrace deposits (Holocene to Pleistocene) at surface, covers < 0.1 % of this area

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

Holocene series (Quaternary-Holocene Series) at surface, covers < 0.1 % of this area

Alluvium - clay, silt, sand, and gravel.

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

Sand and clay