Austin, George S.Sims, Paul K.Magnetic (interpretation of magnetic data collected from airborne or ground surveys, indicating the distribution and concentration of magnetic minerals (primarily iron-bearing) within the upper crust of the earth) map of McLeod County, Minnesota, scale 1 inch = about 1 1/4 mile.PDFengMinnesota Geological SurveyPublicGeologic interpretation of magnetic map of McLeod County, Minnesota, RI-1, Plate 1MapsMinnesota1963University of Minnesota