Impact event

Impact events are caused by the collision of large meteoroids, asteroids or comets (generically: bolides) with Earth and may sometimes be followed by mass extinctions of life. For discussion of impacts in general, not just on Earth, see impact crater.

Further reading

• Smit J., Hertogen J. (1980) An extraterrestrial event at the Cretaceous-Tertiary boundary, Nature 285, 198-200.
• Alvarez L.W, Alvarez W., Asaro F., Michel H.V. (1980) Extraterrestral Cause for the Cretaceous-Tertiary Extinction, Science 208, 1095-1108.
• Shukolyukov A., Lugmair G.W. (1998) Isotopic Evidence for the Cretaceous-Tertiary Impactor and Its Type, Science 282, 927-929.

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