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Contact: Bryan Alary
bryan.alary@ualberta.ca
780-492-0436
University of Alberta

Four Billion Years of History

Caption: This four-billion-year-old rock sample from the Acasta Gneiss Complex in the Northwest Territories was used to determine how the Earth's earliest continental crust formed.

Credit: Bryan Alary/University of Alberta

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Related news release: Four-billion-year-old rocks yield clues about Earth's earliest crust


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