The BCk horizon has hue of either 10YR, 2.5Y, or 5Y, value of 5 to 7, and chroma of 1 or 2. Some pedons lack BCk horizons. Some pedons have a few brownish or grayish mottles. Texture is clay loam, loam, sandy clay loam, sandy clay, or clay. Concretions, threads, or masses of calcium carbonate range from few to common.
Reaction is mildly alkaline or moderately alkaline.
The C horizon has hue of 10YR, 2.5Y, or 5Y, value of 7 to 8, and chroma of 1 to 3. It is weakly cemented siltstone or mudstone. In some pedons the material crushes to silt loam, silty clay loam, or silty clay texture. Some pedons have interbedded tuffaceous sandstone or shale that has clay texture. Some crack faces contain thin coatings of calcium carbonate.