Bedrock geology of Minnesota: Postcard

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Bedrock geology of Minnesota: Postcard

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1992

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Minnesota Geological Survey

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Abstract

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.

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Morey, G.B.. (1992). Bedrock geology of Minnesota: Postcard. Retrieved from the University Digital Conservancy, https://hdl.handle.net/11299/59845.

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