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The Precambrian (or Pre-Cambrian) is the large span of time in Earth's history before the current Phanerozoic Eon, and is a Supereon divided into several eons of the geologic time scale. It spans ...
Dbpediathing
The Neoarchean (/ˌniː.oʊ.ɑrˈkiː.ən/; also spelled Neoarchaean) is a geologic era within the Archaean. It spans the period of time from 2,800 to 2,500 million years ago—the period being defined chronom ...
Dbpediathing
The Archean Eon (/ɑrˈkiːən/, also spelled Archaean; formerly Archaeozoic /ɑrkiːəˈzoʊɪk/), also spelled Archeozoic or Archæozoic) is a geologic eon before the Proterozoic Eon, before 2.5 Ga (billion ye ...
Dbpediathing
The Proterozoic /ˌproʊtərɵˈzoʊ.ɨk/ is a geological eon representing the time just before the proliferation of complex life on Earth. The name Proterozoic comes from Greek and means "earlier life& ...
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