Slopes are 3 to 45 percent. The particle-size control section averages 25 to 33 percent clay in the fine earth fraction and 40 to 75 percent basalt fragments by volume. Solum thickness and depth to a lithic contact ranges from 5 to 10 inches.
Reaction is neutral or slightly alkaline.
The Bt horizon has value of 4 or 5 dry and chroma of 3 or 4 dry or moist. It is very gravelly loam, very cobbly loam, very gravelly clay loam or extremely gravelly loam. It is neutral or slightly alkaline. These are the Altow, Boomstick , Checkett , Cottle , Fortyday , Gabbvally , Hooplite , Olac , Old camp , Phliss , Rowel , Soughe , Stewval , and Thike series. Atlow soils are 14 to 20 inches deep and are moderately to strongly alkaline in the argillic horizon.