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Aeromagnetic map of Minnesota, north-central region--Blackduck quadrangle

Authors:
and
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.
Collection:
Minnesota Geological Survey
Place:
Minnesota, United States
Subject:
Environment
Year:
1998
Contributed by:
Minnesota
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