The Minnesota Geological Survey is a unit of the Newton Horace Winchell School of Earth Sciences at the University of Minnesota."About us", Minnesota Geological Survey, Newton Horace Winchell School of Earth and Environmental Sciences at the University of Minnesota
History The Minnesota Geological Survey was established by the Minnesota State Legislature in 1872 as the Geological and Natural History Survey of Minnesota, and Newton Horace Winchell was appointed as its director.
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External links Depth of Bedrock in Minnesota (2018, EN)