2002. Chandler, Val W. Gravity (interpretation of gravity data collected with ground based meters indicating differences in rock density of rocks in the upper crust) and ... Minnesota Geological Survey.
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2001. Chandler, Val W. Gravity (interpretation of gravity data collected with ground based meters indicating differences in rock density of rocks in the upper crust) and ... Minnesota Geological Survey.
2001. Chandler, Val W. Gravity (interpretation of gravity data collected with ground based meters indicating differences in rock density of rocks in the upper crust) and ... Minnesota Geological Survey.
1949. This is one in a series of 455 mid 20th century fire insurance maps produced by the Fire Insurance Rating Organization of New Jersey. Municipal Fir...
2975. Surface formations and agricultural conditions of northeastern Minnesota, Bulletin 13, Plate 1
1917. Leverett, Frank, 1859-1943 and Sardeson, Frederik W. Sheet 2, Map of the Surface (glacial landforms) Formations and agricultural conditions of northeastern Minnesota, scale 1:500,000. Minnesota Geological Survey.
2976. Surface formations and agricultural conditions of northwestern Minnesota, Bulletin 12, Plate 1
1915. Leverett, Frank, 1859-1943. Map showing the Pioneer iron mine, surveyed July 13, 1889, scale 1 inch = about 6.25 feet. Minnesota Geological Survey.
1919. Leverett, Frank, 1859-1943 and Sardeson, Frederik W. Sheet 3, Map of the Surface (glacial landforms) Formations and agricultural conditions of the southern half of Minnesota, scale 1:500,000. Minnesota Geological Survey.
1998. Lusardi, Barbara A. Quaternary geology map showing interpretations of Quaternary (Pleistocene [glacial] and Holocene [post-glacial]) surficial geology (distribution an... Minnesota Geological Survey.
1993. Meyer, Gary N. Quaternary geology map showing interpretations of Quaternary (Pleistocene [glacial] and Holocene [post-glacial]) surficial geology (distribution an... Minnesota Geological Survey.
2001. Lusardi, Barbara A. Quaternary geology map showing interpretations of Quaternary (Pleistocene [glacial] and Holocene [post-glacial]) surficial geology (distribution an... Minnesota Geological Survey.