Deep TimeCosmos & Earth
First oceans
4.4 billion years agoMajor
Liquid water pools on Earth's surface, recorded in 4.4-billion-year-old zircon crystals from Australia.
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Documentnature.com
Evidence from detrital zircons for continental crust and oceans 4.4 Gyr ago (Wilde et al., Nature 2001) ↗Editor's pick