Shuram excursion

The Shuram excursion, or Shuram-Wonoka excursion, is a change in δ13C, or in the ratio of carbon-13 to carbon-12, starting around 551 million years ago during the Ediacaran Period. It was first noticed in the in South Australia in 1990 and later in the in Oman in 1993.^[1] It is the largest negative δ13C excursion in Earth history, and recovery took 50 million years.^[2]

It is not known what caused the excursion. It may have played a role in sparking the rise of animals that resulted later in the Cambrian explosion.^[3]

References[]

^ George Williams and Phillip Schmidt (Mar 2018). "Shuram–Wonoka carbon isotope excursion: Ediacaran revolution in the world ocean's meridional overturning circulation". Geoscience Frontiers. doi:10.1016/j.gsf.2017.11.006.
^ Erwan Le Guerroué; et al. (Apr 2006). "Chemostratigraphic and sedimentological framework of the largest negative carbon isotopic excursion in Earth history: The Neoproterozoic Shuram Formation (Nafun Group, Oman)". Precambrian Research. doi:10.1016/j.precamres.2006.01.007.
^ Colin Barras (Nov 9, 2019). "The weird creatures that might be the very first complex animals". New Scientist.

[1] George Williams and Phillip Schmidt (Mar 2018). "Shuram–Wonoka carbon isotope excursion: Ediacaran revolution in the world ocean's meridional overturning circulation". Geoscience Frontiers. doi:10.1016/j.gsf.2017.11.006.

[2] Erwan Le Guerroué; et al. (Apr 2006). "Chemostratigraphic and sedimentological framework of the largest negative carbon isotopic excursion in Earth history: The Neoproterozoic Shuram Formation (Nafun Group, Oman)". Precambrian Research. doi:10.1016/j.precamres.2006.01.007.

[3] Colin Barras (Nov 9, 2019). "The weird creatures that might be the very first complex animals". New Scientist.

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