Superimposed magnetic on gravity anomaly map of the Duluth Complex and related rocks, northeastern Minnesota, M-120
Description
Gravity (interpretation of gravity data collected with ground based meters indicating differences in rock density of rocks in the upper crust) and magnetic anomaly (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) map of the Duluth complex and related rocks, scale 1:200,000.
Chandler, Val W. (2001). Superimposed magnetic on gravity anomaly map of the Duluth Complex and related rocks, northeastern Minnesota, M-120. Minnesota Geological Survey. https://reflections.mndigital.org/catalog/mgs:1180 (map)