Marietta soils occur on similar flood plains. Sumter soils occur on adjacent uplands. They are moderately deep to chalk or marl at 20 to 40 inches and have more than 40 percent calcium carbonate equivalent. Tuscumbia and Una soils occur on similar flood plains. They do not contain intersecting slickensides, are not calcareous and more acid throughout.
Most areas are subject to flooding.
Also used for pasture and hay crops. Native vegetation was osage orange, hackberry, ash, shagbark hickory and oak. Blackland Prairie area of southwest Arkansas, and possibly other areas in Mississippi. The series is of moderate extent. Cambic horizon-zone from 8 to 72 inches.