These soils are on nearly level flood plains. Slopes range from 0 to 1 percent. Solum thickness is more than 80 inches. Texture is clay or silty clay throughout. Weighted average clay content of the particle-size control section is 40 to 60 percent.
Reaction is slightly or moderately alkaline throughout.
Amplitude of waviness between the A and Bss horizons is 5 to 14 inches. Undisturbed areas have gilgai microrelief with microknolls 2 to 8 inches above the microdepressions. Depth to slickensides and wedge shaped peds begin at a depth ranging from 8 to 24 inches and range from few to common. Masses of iron-manganese range from few to common in the Bss horizons. The Ap or A horizon has hue of 10YR, value of 2 to 4, and chroma of 1 to 2.