Difference between revisions of "Cretaceous-Tertiary Mass Extinction"
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| − | Evolutionary biologists and geologists generally believe that a mass extinction of dinosaurs happened 65 million years ago at the end of the [[Cretaceous Period]]. | + | Evolutionary biologists and geologists generally believe that a mass extinction of [[dinosaurs]] and other organisms happened 65 million years ago at the end of the [[Cretaceous Period]]. The primary cause of this extinction is generally believed to be an asteroid or comet impact, linked to the large crater found off the Yucatan Peninsula.<ref>[http://www.lpl.arizona.edu/SIC/impact_cratering/Chicxulub/Discovering_crater.html Chicxulub Impact Event: Discovering the Crater.] Accessed April 24, 2007.</ref> |
| − | + | ==References== | |
| − | + | <references/> | |
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==External links== | ==External links== | ||
Revision as of 07:20, April 24, 2007
Evolutionary biologists and geologists generally believe that a mass extinction of dinosaurs and other organisms happened 65 million years ago at the end of the Cretaceous Period. The primary cause of this extinction is generally believed to be an asteroid or comet impact, linked to the large crater found off the Yucatan Peninsula.[1]
References
- ↑ Chicxulub Impact Event: Discovering the Crater. Accessed April 24, 2007.
External links
- The K-T Event - NASA's Jet Propulsion Laboratory