Aeromagnetic map of Minnesota, north-central region--Upper Red Lake quadrangle
Description
Total magnetic intensity anomaly, contour, scale 1:100,000.Interpretation of magnetic data collected from airborne surveys, the map contours (lines of equal magnetic intensity) indicate the distribution and concentration of magnetic minerals (primarily iron-bearing) within the upper crust of the earth.
Chandler, Val W., Lively, R. S. (1998). Aeromagnetic map of Minnesota, north-central region--Upper Red Lake quadrangle. Minnesota Geological Survey. https://reflections.mndigital.org/catalog/mgs:610 (map)