The Wayback Machine - https://web.archive.org/all/20080222164245/http://www.nps.gov/kewe/historyculture/index.htm
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Keweenaw National Historical Park
History & Culture
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Did You Know?
During the ice ages, glaciers ripped chunks of copper away from exposed rock outcrops and then carried the copper sometimes long distances before depositing them. These loose pieces are referred to as float copper.
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Last Updated: February 23, 2007 at 15:42 EST |