Add Yahoo as a preferred source to see more of our stories on Google. Scientists recently unveiled the nation's newest "oldest known" rock — discovered in Michigan's Upper Peninsula. Michigan, ...
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America’s Oldest Rock Discovered, But It’s No Match for Canada’s 4 Billion-Year Winner
A new geological study has uncovered the oldest rock in the United States, dating back 3.6 billion years. The research, published in GSA Today, identifies the Watersmeet Gneiss in Michigan as ...
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