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1. Aeromagnetic map of Minnesota, central region, Plate 1

1985. Chandler, Val W. Total magnetic intensity anomaly (relative to the earth's magnetic field), color coded, scale 1:250,000. Interpretation of magnetic data collected...

2. Aeromagnetic map of Minnesota, central region, Plate 2

1985. Chandler, Val W. Total magnetic intensity anomaly, contour, scale 1:250,000. Interpretation of magnetic data collected from airborne surveys, the map contours (line...

3. Simple Bouguer gravity map of Minnesota, Hibbing sheet, M-56

1985. Chandler, Val W., Jirsa, Mark A., and Ikola, Rodney J. Bouguer gravity anomaly map (anomaly related to different densities of rocks in the upper crust, Bouguer anomaly is a corrected difference between ...