Archean eon

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Related to Archean eon: Proterozoic eon, Phanerozoic eon

Archean eon:

see PrecambrianPrecambrian,
name of a major division of geologic time (see Geologic Timescale, table), from c.5 billion to 570 million years ago. It is now usually divided into the Archean and Proterozoic eons. Precambrian time includes 80% of the earth's history.
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References in periodicals archive ?
Two researchers from University of Colorado Boulder say all that may have been required to sustain liquid water and primitive life on Earth during the Archean eon 2.
Previously scientists have explained the presence of liquid water in that lowlight time, during the Archean Eon (about 3.
Most of the largest formations date from the late Archean eon, which ended around 2.