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Mulde event

Anoxic event causing mass extinctions during the Silurian period

Summary

Anoxic event causing mass extinctions during the Silurian period

The Mulde event was an anoxic event, and marked the second of three relatively minor mass extinctions (the Ireviken, Mulde, and Lau events) during the Silurian period. It coincided with a global drop in sea level, and is closely followed by an excursion in geochemical isotopes. Its onset is synchronous with the deposition of the Fröjel Formation in Gotland.{{cite journal

Higher resolution δ13C isotope analysis identifies differences in the organic and carbonate carbon isotope curves (Δ13C), allowing the inference of a sustained drop in CO2 levels coincident with the extinction once sedimentological data are taken into account.

Notes

The Ireviken, Mulde, and Lau events were all closely followed by isotopic excursions.

References

References

  1. (2017). "Harnessing stratigraphic bias at the section scale: Conodont diversity in the Homerian (Silurian) of the Midland Platform, England". Palaeontology.
  2. (2021). "Asynchronous δ13Ccarb and δ13Corg records during the onset of the Mulde (Silurian) positive carbon isotope excursion from the Altajme core, Gotland, Sweden". Chemical Geology.
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extinction-events silurian isotope-excursions
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