Depth to lithic contact is 10 to 20 inches. The particle-size control section averages 45 to 70 percent angular basalt fragments. The mollic epipedon is 10 to 17 inches thick. The A2 horizon is very cobbly silt loam, very stony silt loam, very cobbly loam, or very gravelly silt loam. It is very cobbly loam or very gravelly silt loam.
Reaction is moderately alkaline or strongly alkaline.
It is very cobbly loam, extremely cobbly loam, very cobbly silt loam, extremely cobbly silty loam, or extremely gravelly silt loam. Reaction is moderately alkaline or strongly alkaline. These are the Aldax , Bakeoven , Bodell , Lickskillet , Plaskett , Rockly , Swakane , and Venator series. All of these soils lack a calcic horizon. In addition, Bakeoven, Rockly, and Swakane soils are less than 10 inches deep to a lithic contact.