Unformatted text preview: The Cretaceous | The Cretaceous period, spanning the time interval from 144 to 65 million years ago, saw the final phases of the opening of the Atlantic Ocean, as well as the northward migration of India toward its collision with Asia during the Tertiary period of the Cenozoic era. The last of the major forms of plant life, the angiosperms, appeared near the beginning of the period. Dinosaurs continued their diversification, with the increasing dominance of the herbivorous ornithischians. The Cretaceous ended with the famous mass extinction that resulted in the extinction of the non-avian dinosaurs, the swimming reptiles, pterosaurs, ammonites and other creatures, nearly three-fourths of all life on Earth in fact....
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- Fall '10
- Biology, Jurassic, minor mass extinctions, Jurassic Extinctions, famous mass extinction