Archean eon


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Related to Archean eon: Proterozoic eon, Phanerozoic eon

Archean eon

The first eon in Earth’s history (4.6–2.5 billion years ago).
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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
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
References in periodicals archive ?
Evidence of the paradox comes from clues in the rock record that indicate the presence of flowing water as far back as the Archean eon, 3.
The new 3-D model of the Archean Eon on Earth that lasted from about 3.
5 billion years ago - during what is known as the Archean Eon - because elements like potassium and uranium were decaying and releasing radioactive heat, according to (http://vtnews.