Neoproterozoic oxygenation event

The Neoproterozoic Oxygenation Event (NOE), also called the Second Great Oxidation Event (the first having occurred during the Palaeoproterozoic), was a time interval between around 850 and 540 million years ago which saw a very significant increase in oxygen levels in Earth's atmosphere and oceans.^[1] Bringing an end to the Boring Billion, a period of extremely low atmospheric oxygen spanning from the Statherian to the Tonian, the NOE was the second major increase in atmospheric and oceanic oxygen concentration on Earth, though it was not as large as the Great Oxidation Event (GOE) of the Neoarchean-Paleoproterozoic boundary. Unlike the GOE, it is unclear whether the NOE was a synchronous, global event or a series of asynchronous, regional oxygenation intervals with unrelated causes.^[2]

^ Och, Lawrence M.; Shields-Zhou, Graham A. (January 2012). "The Neoproterozoic oxygenation event: Environmental perturbations and biogeochemical cycling". Earth-Science Reviews. 110 (1–4): 26–57. Bibcode:2012ESRv..110...26O. doi:10.1016/j.earscirev.2011.09.004. Retrieved 10 November 2022.
^ Stern, Robert J.; Mukherjee, Sumit K.; Miller, Nathan R.; Ali, Kamal; Johnson, Peter R. (December 2013). "~750 Ma banded iron formation from the Arabian-Nubian Shield—Implications for understanding neoproterozoic tectonics, volcanism, and climate change". Precambrian Research. 239: 79–94. Bibcode:2013PreR..239...79S. doi:10.1016/j.precamres.2013.07.015. Retrieved 20 December 2022.

[Och2012-1] Och, Lawrence M.; Shields-Zhou, Graham A. (January 2012). "The Neoproterozoic oxygenation event: Environmental perturbations and biogeochemical cycling". Earth-Science Reviews. 110 (1–4): 26–57. Bibcode:2012ESRv..110...26O. doi:10.1016/j.earscirev.2011.09.004. Retrieved 10 November 2022.

[2] Stern, Robert J.; Mukherjee, Sumit K.; Miller, Nathan R.; Ali, Kamal; Johnson, Peter R. (December 2013). "~750 Ma banded iron formation from the Arabian-Nubian Shield—Implications for understanding neoproterozoic tectonics, volcanism, and climate change". Precambrian Research. 239: 79–94. Bibcode:2013PreR..239...79S. doi:10.1016/j.precamres.2013.07.015. Retrieved 20 December 2022.

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