Hadean eon

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  • noun

Synonyms for Hadean eon

the earliest eon in the history of the Earth from the first accretion of planetary material (around 4,600 million years ago) until the date of the oldest known rocks (about 3,800 million years ago)

References in periodicals archive ?
No such rocks are known from the earlier Hadean eon (SN: 5/29/12, p.
"Most of the 420 minerals of the Hadean Eon formed from magma-molten rock that slowly crystallized at or near Earth's surface-as well as the alteration of those minerals when exposed to hot water," he said.
There's no way any life could have survived this." But as the Earth cooled through this period, called the Hadean eon, it slowly became a more habitable place.
Impact evidence from lunar samples, meteorites and the pockmarked surfaces of the inner planets paints a picture of a violent environment in the solar system during the Hadean Eon 4.5 to 3.8 billion years ago, particularly through a cataclysmic event known as the Late Heavy Bombardment about 3.9 million years ago.
Scientists call the first 600 million years of Earth's history the "Hadean eon" because of the presumably hellish temperatures on the freshly coalesced and largely molten planet.