The Wayback Machine - https://web.archive.org/all/20080224232223/http://www.nps.gov/kewe/parknews/newsreleases.htm
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Keweenaw National Historical Park
News Releases
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Did You Know?
The largest known quantities in the world of pure, native copper were found on Michigan's Keweenaw Peninsula. In some cases, the deposits were up to 97% pure, requiring little chemical processing to produce ingots of pure copper.
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Last Updated: August 21, 2006 at 10:41 EST |