Cambrian–Ordovician extinction event
(Redirected from Cambrian–Ordovician extinction events)
The Cambrian–Ordovician extinction event occurred approximately 488 million years ago (m.y.a.). This early Phanerozoic Eon extinction event eliminated many brachiopods and conodonts, and severely reduced the number of trilobite species.
- Depletion of oxygen in marine waters
- Flood basalt event (Kalkarindji large igneous province, Australia) 
- End-Botomian extinction event, circa 517 m.y.a.
- Dresbachian extinction event, circa 502 m.y.a.
- Geologic time scale
- Furongian, Late or Upper Cambrian period
- Early Ordovician period
- Gradstein, Felix, James Ogg, and Alan Smith, eds., 2004. A Geologic Time Scale 2004 (Cambridge University Press).
- Hallam, Anthony and Paul B. Wignall, 1997. Mass extinctions and their aftermath (Oxford University Press).
- Webby, Barry D. and Mary L. Droser, eds., 2004. The Great Ordovician Biodiversification Event (Columbia University Press).
- Kravchinsky, V. A. (2012). Paleozoic large igneous provinces of Northern Eurasia: Correlation with mass extinction events. Global and Planetary Change, 86, 31-36.
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