The Griswold series consists of very deep, well drained soils formed in calcareous sandy loam till on till plains and moraines of Wisconsinan Age.
Permeability is moderate.
Slope ranges from 0 to 20 percent. Griswold loam - 4 to 6 percent slopes in a cultivated field at an elevation of about 830 feet. 42 degrees 25 minutes 3 seconds N., and long. 88 degrees 18 minutes 12 seconds W., NAD 27. The depth to the base of soil development is 24 to 40 inches.