Explanation and maps of the bedrock geology of northwestern Minnesota. Contains drillhole data and results from chemical analysis of drill core samples. Four plates included. Geologic map superseded by Minnesota Geological Survey publications M-80, M-92.
Jirsa, M.A.; Runkel, A.C.; Chandler, V.W.; Boerboom, T.J..
Preliminary bedrock geologic maps of northwestern Minnesota.
Minnesota Geological Survey.
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