Ancient 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.
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. This story matters for Science & Discovery readers tracking science. Reported by phys.org. Read the full original at the source link below.
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