Great Oxygenation Event

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Great Oxygenation Event

proper noun the Great Oxygenation Event

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

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"Great Oxygenation Event." Wiktionary, via Micwyn, micwyn.com/word/great%20oxygenation%20event. Accessed 6 Nov. 2026.

APA

Great Oxygenation Event. (n.d.). In Wiktionary, via Micwyn. Retrieved November 6, 2026, from https://micwyn.com/word/great%20oxygenation%20event

Chicago

"Great Oxygenation Event." Wiktionary, via Micwyn. Accessed November 6, 2026. https://micwyn.com/word/great%20oxygenation%20event.

BibTeX

@misc{great_oxygenation_event_2026,
  title = {Great Oxygenation Event},
  howpublished = {Wiktionary, via Micwyn},
  year = {2026},
  url = {https://micwyn.com/word/great%20oxygenation%20event},
  urldate = {2026-11-06}
}