Hadean eon

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Related to Hadean eon: Archean eon, Proterozoic eon, Phanerozoic eon
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Noun1.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); no evidence of life
References in periodicals archive ?
The new research reveals that asteroidal collisions not only severely altered the geology of the Hadean eon Earth, but likely also played a major role in the subsequent evolution of life on Earth as well.
The period is called Hadean eon after the Greek god of the underworld- Hades- for its hot and inhospitable atmosphere.
No such rocks are known from the earlier Hadean eon (SN: 5/29/12, p.