Geologic units in Monroe county, Arkansas

Terrace deposits (Late Pleistocene) at surface, covers 65 % of this area

Alluvial deposits on one or more terrace levels

Alluvium - Alluvial deposits in major stream channels or in mappable meanders of major streams (Holocene) at surface, covers 20 % of this area

Alluvial deposits in major stream channels or in mappable meanders of major streams - Includes alluvial deposits in natural levees in some areas.

Alluvium - Alluvial deposits of local streams or of overbank flow of major streams (Holocene) at surface, covers 16 % 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

Dune sand (Late Pleistocene) at surface, covers 0.1 % of this area

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