They formed in loamy and gravelly outwash overlying sandy, gravelly, and loamy outwash deposits.
Permeability is moderate in the solum and moderately rapid in the underlying material.
Slope ranges from 0 to 2 percent. Millgrove silt loam on a slope of less than 1 percent in a cultivated field at an elevation of 995 feet above sea level. 40 degrees 38 minutes 02 seconds N. and long. 82 degrees 55 minutes 52 seconds W., NAD 27. Thickness of the mollic epipedon ranges from 10 to 18 inches and includes the upper part of the B horizon in some pedons.