HyperDic: hadean_eon

English > 1 sense of the expression Hadean eon:
NOUNtimeHadean eon, Hadean, Hadean time, Hadean aeon, Priscoan, Priscoan eon, Priscoan aeonthe 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)
English > Hadean eon: 1 sense > noun 1, time
MeaningThe 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.
SynonymsHadean, Hadean time, Hadean aeon, Priscoan, Priscoan eon, Priscoan aeon
Instance ofeon, aeonThe longest division of geological time

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