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

Maps University Of Minnesota Public content
1968. Ikola, R.J. Bouguer gravity anomaly map (anomaly related to different densities of rocks in the upper crust, Bouguer anomaly is a corrected difference between ... Minnesota Geological Survey.

56. Slopes - Generalized

Maps University Of Minnesota Public content
1968. Bounding Box (W,S,E,N): -93.9791,44.4981,-92.8021,45.361 Ecological Study for the Twin Cities Metropolitan Area. Wallace, McHarg, Roberts and Todd.