Cretaceous Era

By: Andres VargasSergio Madrigal Federico Monge

Cretaceous Period

• Cretaceous Period lasted 71 million years.

• Extinction occurred around 65.5 million years ago.

• Species were mostly dinosaurs and reptiles.

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)

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.

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.

Ammonites

Species

Marine Reptiles