Long gone miners left clues in lake pollution

Michigan’s Upper Peninsula is rich in copper metal, and people have been mining it for longer than you might expect–about 8,000 years. Learn how a team of scientists used traces of pollution trapped in lake sediments to reconstruct ancient mining activities on Isle Royale National Park in my story for Eos.org.

A 12-ounce nugget of native copper found in Michigan. (Credit: Rob Lavinsky, Wikimedia Commons)
A 12-ounce nugget of native copper found in Michigan. (Credit: Rob Lavinsky, Wikimedia Commons)
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