extinction | Cretaceous–Paleogene extinction event | Impact event | Yanni Live! The Concert Event | Tunguska event | Extinction | Saturday Night's Main Event | Local extinction | The Airborne Toxic Event | Resident Evil: Extinction | Permian–Triassic extinction event | 2012 PDC European Tour Event 5 | Tragedy (event) | ''The Main Event'' | men's skeleton event | men's singles event | Major sports event hosting in Britain during the 2010s | Complex event processing | Bridge of Flowers (event) | 2009 Jupiter impact event | women's under 40kg event | women's K-1 event | women's K-1 500 m event | Women's event | William Brumfield at an April 18, 2013 event "Memory, Commemoration, Memorialization: Moscow’s Western Battlefields" at the Kennan Institute. | True Heroes (event) | Triassic–Jurassic extinction event | The ''obstacle race'', an event of naval pentatthlon at the 2007 Military World Games | SpiritBank Event Center | Signing Event of Japanese Drama ''Honey and Clover |
The Alvarez hypothesis posits that the mass extinction of the dinosaurs and many other living things was caused by the impact of a large asteroid on the Earth sixty-five million years ago, called the Cretaceous–Paleogene extinction event.
The loss of the blue walleye is, arguably, an extinction event on par with the loss of the passenger pigeon and the near-extirpation of the American bison.
While other groups of crinoids flourished during the Permian, bourgueticrinids along with other extant orders did not appear until the Triassic, following a mass extinction event in which nearly all crinoids died out.
The main evidence for the Alvarez hypothesis that a single impact resulted in the Cretaceous–Paleogene extinction event that killed the dinosaurs has come from the presence around the world of shocked quartz granules, glass spherules and tektites embedded in a layer of clay with extremely high levels of iridium, all signs of an asteroid impact.