Alluvial deposits on one or more terrace levels
Alluvial deposits of local streams or of overbank flow of major streams - In some areas includes deposits in abandoned meanders of major streams
Deposited mostly on terrace deposits of the second level. Younger than some terrace deposits, older than others
Alluvial deposits in major stream channels or in mappable meanders of major streams - Includes alluvial deposits in natural levees in some areas.
Cane Hill Member of Hale Formation
Bloyd Shale, and Prairie Grove Member of the Hale Formation
Pitkin Limestone, Fayetteville Shale (including the Wedington Sandstone member), and Batesville Sandstone (including the Hindsville Limestone Member)