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Archaean

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Archaean

Widely used term for the earliest era of geological time; the first part of the Precambrian Eon, spanning the interval from the formation of Earth to about 2,500 million years ago.
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During this period in its history, known as the Archaean, the Earth was covered by a poisonous smog of methane, ammonia and other toxic gases.
Life's beginnings; WORLD TODAY: SCIENCE by The Journal (Newcastle, England)
In the second case study the material was soapstone, belonging to an Archaean greenstone belt, situated in North Karelia in the border zone between the Archaean area and the Palaeoproterozoic North Karelian Schist Belt (Fig.
Natural stone assessment with ground penetrating radar/Loodusliku ... by Luodes, Hannu / Estonian Journal of Earth Sciences
For example, preeminent evolutionary biologist Ernst Mayr, who died in 2005, never accepted an archaean domain.
The Third Domain: Untold Story of Archaea and the Future of ... by Krause, Kenneth / The Humanist
 
 
 
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