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Archean - Wikipedia, the free encyclopedia

The Archean Eon (/ ɑːr ˈ k iː ə n /, also spelled Archaean) is a geologic eon, following the Hadean Eon and preceding the Proterozoic Eon. During the Archean ...

The Archean Eon and the Hadean

Online exhibits: Geologic time scale. The Archean Eon and the Hadean. The Archean eon, which preceded the Proterozoic eon, spanned about 1.5 billion years and is ...

Archean - definition of Archean by The Free Dictionary

TEHRAN (FNA)- Earth's mantle temperatures during the Archean eon, which commenced some 4 billion years ago, were significantly higher than they are today.

Archean - New World Encyclopedia

The Archean (or Archaean) eon is an interval of geologic time of about 1.4 billion years, beginning with the formation of Earth's crust and the oldest Earth rocks ...

Archean Eon | geochronology |

Archean Eon, also spelled Archaean Eon, the earlier of the two divisions of Precambrian time (about 4.6 billion to 541 million years ago). The Archean Eon began about ...

Archean : Overview

The term Archean means “ancient” and was originally used to refer to the oldest known rocks. Rocks of Archean age contain the earliest fossils of life on Earth.

The Archean - Windows to the Universe

The Archean is the name of the age which began with the forming Earth. This period of Earth's history lasted a long time, 2.8 billion years!

Archean -

Archean. From Jump to: navigation, search. Retrieved from "" Views. Page; Discussion; View source; History; Personal tools.

Archaean | Define Archaean at

Archaean definition, Archean. See more.; Word of the Day; ... Rocks from the earliest part of the Archean are predominantly volcanic and are similar to ...

Archean | Define Archean at

With the passing of the Archean, the earth had not yet settled into the perfectly balanced sphere which Nature destined it to be.