These Tiny Crystals Are 'Time Capsules' of Earth's Early Plate Tectonic Activity - ScienceAlert

Tiny crystals of zircon dated to 3.8 billion years ago contain the earliest geochemical evidence yet for plate tectonic activity here on Earth.

Tiny crystals of zircon dated to 3.8 billion years ago contain the earliest geochemical evidence yet for plate tectonic activity here on Earth. Isotopes and trace elements preserved in the crystals … [+3861 chars]

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