Will be superceded by Miscellaneous series map M-189 early in 2011
Boerboom, T.J.; Green, J.C..
Preliminary Bedrock Geologic Map of the Grand Marais 7.5' quadrangle, Cook County, Minnesota.
Minnesota Geological Survey.
Retrieved from the University of Minnesota Digital Conservancy,
Content distributed via the University of Minnesota's Digital
Conservancy may be subject to additional license and use
restrictions applied by the depositor.