They are on uplands. Slopes range from 0 to 25 percent.
Permeability is slow to moderately slow.
Clarksburg silt loam, cropland. Solum thickness ranges from 40 to 70 inches. Depth to bedrock is greater than 5 feet. Depth to the fragipan ranges from 20 to 36 inches. Rock fragments of sandstone, chert, and limestone, up to 3 inches long, range from 0 to 25 percent in the horizons above the fragipan, from 5 to 30 percent in the fragipan, and from 5 to 80 percent in the C horizon.