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Era

Mesoarchean

Archean

The third era of the Archean eon, spanning about 3.2 to 2.8 billion years ago. Localized oases of relatively oxygen rich water existed in some nearshore shallow marine settings during this era, an early precursor to the much later atmospheric oxygenation of the Paleoproterozoic. This description is adapted from Wikipedia contributors under CC BY-SA 4.0; changes were made. https://creativecommons.org/licenses/by-sa/4.0/

Facts
Rank
Era 1
Start (Million Years Ago)
3200 1
End (Million Years Ago)
2800 1
Key Event
Oases of relatively high oxygen levels existed in some nearshore shallow marine settings by the Mesoarchean. 1
Connections

Anticipated By

Paleoarchean, Eras

Has Geologic Rank

Geologic Era, Concepts

In Discipline

Geochronology, Disciplines

Precursor To

Neoarchean, Eras
Sources
1. Wikipedia: Archean
Wikipedia
  • Lead section
    The Earth during the Archean was mostly a water world: there was continental crust, but much of it was under a superocean deeper than today's oceans.
  • Ocean and atmosphere chemistry section
    Oases of relatively high oxygen levels existed in some nearshore shallow marine settings by the Mesoarchean.
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