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Archean eon
(redirected from Archaean Eon)

    Also found in: Encyclopedia 0.17 sec.
ThesaurusLegend:  Synonyms Related Words Antonyms
Noun1.Archean eon - the time from 3,800 million years to 2,500 million years ago; earth's crust formed; unicellular organisms are earliest forms of life
Archaeozoic, Archaeozoic aeon, Archean, Archean aeon, Archeozoic, Archeozoic eon
Precambrian, Precambrian aeon, Precambrian eon, Precambrian period - the eon following the Hadean time and preceding the Phanerozoic eon; from about 3,800 million years ago until 544 million years ago


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