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Study challenges common view of oxygen scarcity on Earth 2 billion years ago

Photo by: Phys.org

Shungite, a unique carbon-rich sedimentary rock from Russia deposited 2 billion years ago, holds clues about oxygen concentrations on Earth's surface at that time. Led by Professor Kurt Konhauser at the University of Alberta and Professor Kalle Kirsimäe at the University of Tartu, an international research team involving other colleagues from France, Norway, Russia, and USA, have found strikingly high...

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