1 / 9

Theories of the K-T Extinction

Theories of the K-T Extinction. by: Gary Motz. Theories of the K-T Extinction. Asteroid/meteorite impact? Chixulub crater Yucatan Peninsula Deccan Traps volcanism? Southern India Small mammals ate too many dino eggs?. Impact Theory. Evidence Iridium Concentrations

meda
Download Presentation

Theories of the K-T Extinction

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Theories of the K-T Extinction by: Gary Motz

  2. Theories of the K-T Extinction • Asteroid/meteorite impact? • Chixulub crater Yucatan Peninsula • Deccan Traps volcanism? • Southern India • Small mammals ate too many dino eggs?

  3. Impact Theory Evidence • Iridium Concentrations • Ir is a rare element on Earth, but common in extraterrestrial objects • The age of the crater corresponds with the time of the K-T extinction event

  4. Impact Theory Evidence • The crater is HUGE • Gravity map of Chixulub

  5. Deccan Traps Volcanism • Series of volcanoes and very large basalt flows • Large quantities of ash would have contributed to a worldwide dust cloud • Greenhouse effect

  6. Mammalian Competition • Although mammals and dinosaurs coexisted from the Triassic through the end of the Cretaceous, there is no evidence to support the theory that mammals out-competed the dinosaurs

  7. What really killed them off?

More Related