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Bedrock geology of Minnesota: Postcard
Morey, G.B. (Minnesota Geological Survey, 1992)

Bedrock geology of Minnesota: Postcard


Issue Date

Minnesota Geological Survey


This interim geologic map shows the general distribution of rock types underlying Minnesota's landscape. Some of the rocks are 3.6 billion years old - the oldlest found so far in the United States. The map reflects geologic ideas developed by scientists during the past decade. Because the map was compiled from large-scale maps, large parts of which were interpreted from geophysical data, this image should not be photographically or digitally enlarged for use at a more detailed scale.

Appears in Collection(s)

Suggested Citation
Morey, G.B.. (1992). Bedrock geology of Minnesota: Postcard. 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.