The Summitville series consists of deep, well drained and moderately well drained soils formed in loamy colluvium and in residuum weathered from interbedded red clay shale, siltstone, and sandstone on uplands. Slopes range from 2 to 70 percent.
Permeability is moderately slow.
Summitville silt loam - on a 4 percent convex slope in former cropland, now idle. Thickness of the solum is 30 to 60 inches. Depth to a paralithic contact is 40 to 80 inches. Some pedons have an A horizon up to 4 inches thick that has hue of l0YR or 7.5YR, and value and chroma of 2 to 4. The Ap or A horizon commonly is silt loam, but ranges to loam and channery analogues of these textures.