Archean

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High Quality Content by WIKIPEDIA articles! High Quality Content by WIKIPEDIA articles! The Archean (pronounced / r ki n/, also spelled Archaean, formerly called the Archaeozoic (/ rki zo k/), also spelled Archeozoic or Archæozoic) is a geologic eon before the Paleoproterozoic Era of the Proterozoic Eon, before 2.5 Ga (billion years ago, or 2,500 Ma). Instead of being based on stratigraphy, this date is defined chronometrically. The lower boundary (starting point) has not been officially recognized by the International Commission on Stratigraphy, but it is usually set to 3.8 Ga, at the end of the Hadean Eon. In older literature, the Hadean is included as part of the Archean. The name comes from the ancient Greek " " (Arkh ), meaning "beginning, origin".

Weitere Informationen

  • Allgemeine Informationen
    • GTIN 09786131087776
    • Genre Geowissenschaften
    • Editor Lambert M. Surhone, Miriam T. Timpledon, Susan F. Marseken
    • Anzahl Seiten 116
    • Herausgeber Betascript Publishing
    • EAN 9786131087776
    • Format Fachbuch
    • Titel Archean

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