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3.8 Billion-Year-Old Rock Sequence Found in Greenland Revises Tectonic Timeline（图）
plate tectonics crust
2007/3/26
23 March 2007，A 3.8 billion-year-old sequence of rocks from Greenland is helping scientists pinpoint when the Earth's plate tectonics system kicked into gear, according to new research in the 23 March...