1.

地図
地図
1. Bedrock geologic map of northwestern Minnesota
by Mark A. Jirsa, Anthony C. Runkel, and Val W. Chandler
出版情報: St. Paul, Minn. : Minnesota Geological Survey, University of Minnesota, [1994]
シリーズ名: Miscellaneous map series / Minnesota Geological Survey ; Map M-80
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2.

地図
地図
2. Bouguer gravity anomaly map of Minnesota
compiled by Val W. Chandler and Bryan D. Schaap
出版情報: St. Paul : Minnesota Geological Survey, University of Minnesota, [1991]
シリーズ名: State map series / Minnesota Geological Survey ; S-16
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3. Shaded-relief aeromagnetic anomaly maps of Minnesota
by Val W. Chandler
出版情報: St. Paul : Minnesota Geological Survey, University of Minnesota, [1991]
シリーズ名: State map series / Minnesota Geological Survey ; S-18
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