The soils formed in loamy glacial till of Wisconsin age derived mainly from micaceous schist, gneiss, and phyllite. The frost-free season ranges from 60 to 160 days. Elevations range from 5 to 2500 feet above mean sea level. These are the Berkshire , Houghtonville , Lyman , Rawsonville , Marlow , Peru , and Sunapee soils. The very deep Berkshire, Houghtonville, and Marlow soils are on similar landscapes as the Tunbridge soils.
Marlow soils have a dense substratum.
Houghtonville soils have a thicker spodic horizon. Lyman soils are shallow. The very deep, moderately well drained Peru and Sunapee soils are in slightly lower positions on the landscape, and Peru soils have a dense substratum. The moderately deep Rawsonville soils are on similar landscapes as the Tunbridge soil and have a thicker spodic horizon. Permeability is moderate or moderately rapid.