The time from 3,800 million years to 2,500 million years ago; earth's crust formed; unicellular organisms are earliest forms of life. Synonyms: Archaeozoic, Archaeozoic aeon, Archean, Archean aeon, Archeozoic, Archeozoic eon.
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Words linked to "Archean eon" : aeon, Precambrian eon, Precambrian aeon, archaeozoic, eon, Precambrian period, Precambrian |
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