Thickness of the solum ranges from 12 to 35 inches. Depth to bedrock ranges from 20 to 40 inches. Rock fragments range from 5 to 25 percent in the A horizon, from 25 to 55 percent in individual subhorizons of the B, and from 40 to 80 percent in the C horizon. Rock fragments are generally angular to subangular channers of reddish siltstone, fine grained sandstone or shale. Undisturbed pedons may have a thin BA horizon with 5 to 25 percent rock fragments.
Reaction ranges from moderately acid through very strongly acid throughout the soil.
Illite is the dominant clay mineral with moderate amounts of vermiculite and chlorite. The Ap horizon has hue of 7.5YR or 5YR, value of 2 through 5, and chroma of 2 through 4. It is silt loam or loam in the fine-earth fraction. The B horizon has hue of 5YR through 10R, value of 4 or 5, and chroma of 2 through 8. It is silt loam or loam, in the fine-earth fraction.