The Chalfont series consists of deep and very deep, somewhat poorly drained soils formed in a loess mantle overlying a weathered residuum of shale and sandstone. Slopes range from 0 to 15 percent.
Permeability is slow.
Mean annual precipitation is 43 inches. Chalfont silt loam - cultivated. Solum thickness ranges from 40 to 60 inches. Depth to the fragipan ranges from 15 to 30 inches. The silty mantle is usually 30 to 50 inches thick.