Ireviken event
The Ireviken event was the first of three relatively minor extinction events (the Ireviken, Mulde, and Lau events) during the Silurian period. It occurred at the Llandovery/Wenlock boundary (mid Silurian, 433.4 ± 0.8 million years ago). The event is best recorded at Ireviken, Gotland, where over 50% of trilobite species became extinct; 80% of the global conodont species also became extinct in this interval.
Silurian graphical timeline | ||||||||
−444 — – −442 — – −440 — – −438 — – −436 — – −434 — – −432 — – −430 — – −428 — – −426 — – −424 — – −422 — – −420 — – −418 — | Paleozoic Ordovician Silurian Llandovery Wenlock Ludlow Přídolí Rhuddanian Telychian Sheinwoodian Ludfordian |
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Subdivision of the Silurian according to the ICS, as of 2021. Vertical axis scale: millions of years ago. | ||||||||
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