US EditionAmerica’s Oldest Rock Discovered, But It’s No Match for Canada’s 4 Billion-Year Winner
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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 America’s geological record-holder. However, the Acasta Gneiss in Canada, at 4 billion years old, still stands as the undisputed champion of North America and potentially the world. A Longstanding but Misleading Record For years, Minnesota’s Morton Gneiss w…
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