Lau event
The Lau event was the last of three relatively minor mass extinctions (the Ireviken, Mulde, and Lau events) during the Silurian period. It had a major effect on the conodont fauna, but barely scathed the graptolites, though they suffered an extinction very shortly thereafter termed the Kozlowskii event that some authors have suggested was coeval with the Lau event and only appears asynchronous due to taphonomic reasons. It coincided with a global low point in sea level caused by glacioeustasy and is closely followed by an excursion in geochemical isotopes in the ensuing late Ludfordian faunal stage and a change in depositional regime.
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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