Cretaceous Era By: Andres Vargas Sergio Madrigal Federico Monge.
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Transcript of Cretaceous Era By: Andres Vargas Sergio Madrigal Federico Monge.
![Page 1: Cretaceous Era By: Andres Vargas Sergio Madrigal Federico Monge.](https://reader036.fdocuments.net/reader036/viewer/2022062517/56649e795503460f94b79443/html5/thumbnails/1.jpg)
Cretaceous Era
By: Andres VargasSergio Madrigal Federico Monge
![Page 2: Cretaceous Era By: Andres Vargas Sergio Madrigal Federico Monge.](https://reader036.fdocuments.net/reader036/viewer/2022062517/56649e795503460f94b79443/html5/thumbnails/2.jpg)
Cretaceous Period
• Cretaceous Period lasted 71 million years.
• Extinction occurred around 65.5 million years ago.
• Species were mostly dinosaurs and reptiles.
![Page 3: Cretaceous Era By: Andres Vargas Sergio Madrigal Federico Monge.](https://reader036.fdocuments.net/reader036/viewer/2022062517/56649e795503460f94b79443/html5/thumbnails/3.jpg)
Extinction
• The Cretaceous Tertiary mass extinction took place 65 million years ago.
• 75% of species got extinct.
• Non – avian Dinosaurs • Pterosaurs• Marine reptiles (Not all)
![Page 4: Cretaceous Era By: Andres Vargas Sergio Madrigal Federico Monge.](https://reader036.fdocuments.net/reader036/viewer/2022062517/56649e795503460f94b79443/html5/thumbnails/4.jpg)
Facts
• During that time, marine reptiles, ammonites, and dinosaurs were there.
• Hot warm climate.• The end of this period created division
between Mesozoic and Cenozoic eras.• Scientists think it could have been gradual
instead of a very quick extinction.
![Page 5: Cretaceous Era By: Andres Vargas Sergio Madrigal Federico Monge.](https://reader036.fdocuments.net/reader036/viewer/2022062517/56649e795503460f94b79443/html5/thumbnails/5.jpg)
Causes
• Scientists believe it was caused by a giant meteor.
• Another theory, is that there were several strong volcanoes explosions and the ahes cover up the sun.
![Page 6: Cretaceous Era By: Andres Vargas Sergio Madrigal Federico Monge.](https://reader036.fdocuments.net/reader036/viewer/2022062517/56649e795503460f94b79443/html5/thumbnails/6.jpg)
Ammonites
Species
![Page 7: Cretaceous Era By: Andres Vargas Sergio Madrigal Federico Monge.](https://reader036.fdocuments.net/reader036/viewer/2022062517/56649e795503460f94b79443/html5/thumbnails/7.jpg)
Marine Reptiles
![Page 8: Cretaceous Era By: Andres Vargas Sergio Madrigal Federico Monge.](https://reader036.fdocuments.net/reader036/viewer/2022062517/56649e795503460f94b79443/html5/thumbnails/8.jpg)