Ancient rocks reveal when Earth's tectonic engine 'switched on'
Nov 10, 2026
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.
https://phys.org/news/2026-11-ancient-reveal-earth-tectonic.html
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