RESTON, Va. — The U.S. Geological Survey (USGS) and the Michigan Geological Survey are investing $300,000 in mapping the Upper Peninsula of Michigan, one of the most historically important areas of U.S. mineral production for the past 175 years, with copper from the Keweenaw district and White Pine deposit, and iron from the Marquette, Menomonie, and Gogebic iron ranges.
Region 3: Great Lakes
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