The time from 1.5 billion to 5 billion years ago, when the earth's crust was formed; the time when only unicellular organisms and the earliest forms of life are present. Same as Archaeozoic.
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Words linked to "Archeozoic" : eon, Archean eon, archaeozoic, early, Archeozoic eon, Precambrian, Precambrian aeon, Archean aeon, Precambrian period, archean |
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