Geologic units in Chicot county, Arkansas

Alluvium - Alluvial deposits of local streams or of overbank flow of major streams (Holocene) at surface, covers 63 % 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

Alluvium - Alluvial deposits in major stream channels or in mappable meanders of major streams (Holocene) at surface, covers 26 % 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.

Terrace deposits (Late Pleistocene) at surface, covers 10 % of this area

Alluvial deposits on one or more terrace levels

Alluvium (Holocene) at surface, covers 0.6 % of this area

Loam, sand, gravel, and clay; mapped only in Mississippi River Alluvial Plain.

Braided Stream Terraces (Pleistocene) at surface, covers < 0.1 % of this area

Light gray, tan and brown fine to coarse sand; some clay silt and gravel. Overlain by 1-9 meters of loess.

Braided Stream Terraces (Pleistocene) at surface, covers < 0.1 % of this area

Light gray, tan and brown fine to coarse sand; some clay silt and gravel.

Alluvium (Holocene) at surface, covers < 0.1 % of this area

Gray to brownish gray clay and silty clay, reddish brown in the Red River Valley, some sand and gravel locally.

Natural Levees (Holocene) at surface, covers < 0.1 % of this area

Gray and brown silt, silty clay, some very fine sand, reddish brown along the Red River.