Great Oxygenation Event

proper noun

A period around 2.5 to 2.3 billion years ago when the atmosphere of the Earth and its shallow oceans saw a sustained increase in oxygen, caused by the widespread proliferation of photosynthetic cyanobacteria.

Similar
GOEOxygen RevolutionOxygenation EventGreat OxygenationOxygen CatastropheOxygen CrisisOxygen HolocaustOxygenation Crisis
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Meanings

proper nounthe Great Oxygenation Event
  1. earth sciencebiologyA period around 2.5 to 2.3 billion years ago when the atmosphere of the Earth and its shallow oceans saw a sustained increase in oxygen, caused by the widespread proliferation of photosynthetic cyanobacteria.

    Synonyms: GOE, Oxygen Revolution, Oxygenation Event, Great Oxygenation, Oxygen Catastrophe, Oxygen Crisis, Oxygen Holocaust, Oxygenation Crisis

Synonyms & antonyms

proper nounA period around 2.5 to 2.3 billion years ago when the atmosphere of the Earth and its shallow oceans saw a sustained increase in oxygen, caused by the widespread proliferation of photosynthetic cyanobacteria.

Similar
GOEOxygen RevolutionOxygenation EventGreat OxygenationOxygen CatastropheOxygen CrisisOxygen HolocaustOxygenation CrisisOxygenation HolocaustOxygenation Catastrophe
Also see
great oxygenationoxygenation catastropheoxygenation crisisoxygenation eventoxygenation holocaustoxygen catastropheoxygen crisisoxygen holocaustoxygen revolution
Cite this entry
APA

Great Oxygenation Event. (n.d.). In WatkinsX Dictionary. Retrieved November 5, 2026, from https://dictionary.watkinsx.com/word/Great%20Oxygenation%20Event

MLA

“Great Oxygenation Event.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/Great%20Oxygenation%20Event. Accessed November 5, 2026.

Chicago

WatkinsX Dictionary, s.v. “Great Oxygenation Event,” accessed November 5, 2026, https://dictionary.watkinsx.com/word/Great%20Oxygenation%20Event.

Source: Great Oxygenation Event on Wiktionary, CC BY-SA 4.0.