Scientists discover how and when a subterranean ocean emerged

«The mechanism which caused the crust that had been altered by seawater to sink into the mantle functioned over 3.3 billion years ago. This means that a global cycle of matter, which underpins modern plate tectonics, was established within the first billion of the Earth’s existence, and th …
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Enlace: Scientists discover how and when a subterranean ocean emerged