Bloyd Shale, and Prairie Grove Member of the Hale Formation
Alluvial deposits on one or more terrace levels
Atoka Formation - Middle part
Alluvial deposits of local streams or of overbank flow of major streams - In some areas includes deposits in abandoned meanders of major streams
Atoka Formation, undivided
Alluvial deposits in major stream channels or in mappable meanders of major streams - Includes alluvial deposits in natural levees in some areas.
Atoka Formation - Upper part
Alluvial deposits of present streams
Cane Hill Member of Hale Formation