However, cracks remain open for less than 90 cumulative days during most years. Iron manganese concretions and masses range fron none to about 3 percent by volume throughout. Reaction is slightly alkaline or moderately alkaline and it ranges from very slightly to strongly effervescent. Some pedons have buried A horizons in the control section. The A horizon has hue of 2.5YR to 10YR, value of 3 or 4, and chroma of 2 or 3.
Texture is clay or silty clay.
Most pedons have a few pressure faces or small slickensides in the lower part. The Bw horizon has colors in shades of red, brown, or gray in hue of 2.5YR, 5YR or 7.5YR, value of 3 to 5, and chroma of 2 to 6. Redox depletions with chroma of 2 or less range from few to common. Or, the matrix has chroma of 2 or 3 with distinct redox concentrations in shades of red, yellow, or brown. The Bss horizon has colors in shades of red or brown in hue of 2.5YR, 5YR or 7.5YR, value of 3 to 5, and chroma of 2 to 6.