The Bkss horizon has hue of 2.5Y or 5Y, values of 4 to 6 and 3 to 5 moist, and chroma of 2 to 4. It averages from 60 to 70 percent clay. It is slightly alkaline or moderately alkaline and has few to many accumulations of carbonate in most pedons. The C horizon has hue of 2.5Y or 5Y, values of 5 or 6 and 4 or 5 moist, and chroma of 1 to 3. It contains 1 to 60 percent, pebbles or soft shale fragments by volume.
Reaction ranges from slightly acid to moderately alkaline.
The Cr horizon is soft shale and ranges from strongly acid to moderately alkaline. This is the Boyd series. Boyd soils have less than 60 percent clay in the Bss horizons. Opal soils are on level to moderately steep uplands. Surfaces are plane or convex, and slope gradients range from 0 to 25 percent.