Geologic units in White county, Arkansas

Bloyd Shale, and Prairie Grove Member of the Hale Formation (Middle Pennsylvanian- Morrowan) at surface, covers 28 % of this area

Bloyd Shale, and Prairie Grove Member of the Hale Formation

Terrace deposits (Late Pleistocene) at surface, covers 24 % of this area

Alluvial deposits on one or more terrace levels

Atoka Formation - Middle part (Middle Pennsylvanian- Atokan) at surface, covers 19 % of this area

Atoka Formation - Middle part

Alluvium - Alluvial deposits of local streams or of overbank flow of major streams (Holocene) at surface, covers 11 % 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

Atoka Formation, undivided (Middle Pennsylvanian- Atokan) at surface, covers 7 % of this area

Atoka Formation, undivided

Alluvium - Alluvial deposits in major stream channels or in mappable meanders of major streams (Holocene) at surface, covers 6 % 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.

Atoka Formation - Upper part (Middle Pennsylvanian- Atokan) at surface, covers 4 % of this area

Atoka Formation - Upper part

Alluvium (Holocene) at surface, covers 0.7 % of this area

Alluvial deposits of present streams

Cane Hill Member of Hale Formation (Early Pennsylvanian- Morrowan) at surface, covers < 0.1 % of this area

Cane Hill Member of Hale Formation