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Ancient rocks reveal when Earth's tectonic engine 'switched on'
Phys.org ·
Scientists have identified a major turning point in Earth's geological history, when the processes shaping the planet's crust changed dramatically and began to resemble the plate tectonics we see today—about 2.5 billion years ago.
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- Phys.orgAncient rocks reveal when Earth's tectonic engine 'switched on'Scientists have identified a major turning point in Earth's geological history, when the processes shaping the planet's crust changed dramatically and began to resemble the plate tectonics we see today—about 2.5 billion years ago.