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Geologic units in Jackson county, Arkansas

Terrace deposits (Late Pleistocene) at surface, covers 56 % 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 13 % 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 12 % of this area

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

Alluvium - Alluvial deposits in major stream channels or in mappable meanders of major streams (Holocene) at surface, covers 10 % 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.

Cane Hill Member of Hale Formation (Early Pennsylvanian- Morrowan) at surface, covers 4 % of this area

Cane Hill Member of Hale Formation

Bloyd Shale, and Prairie Grove Member of the Hale Formation (Middle Pennsylvanian- Morrowan) at surface, covers 4 % of this area

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) (Late Mississippian- Chesterian) at surface, covers 0.2 % of this area

Pitkin Limestone, Fayetteville Shale (including the Wedington Sandstone member), and Batesville Sandstone (including the Hindsville Limestone Member)

Midway Group (Paleocene) at surface, covers 0.1 % of this area

Midway Group