Nantucket soils are gently sloping or strongly sloping soils on terminal moraines or ground moraines in close proximity to terminal moraines. Slope is 3 to 15 percent. The soils formed in loamy glacial till or till mixed or folded with Pleistocene Age silts and clays. F. Mean annual precipitation ranges from 40 to 50 inches, and mean growing season ranges from 180 to over 200 days. These include the Chilmark , Evesboro , and Plymouth soils on nearby landscapes.
Chilmark soils have argillic horizons.
Evesboro and Plymouth soils lack cambic horizons. Chilmark, Evesboro, and Plymouth soils also lack dense till substrata. Runoff is medium. Permeability is moderately rapid in the solum and moderately slow or slow in the substratum. Most of this soil is in low quality woodland or scrubby brushland.