A Quick Look at the Jurassic World

David Lillis – 16 July 2020
e-mail: sigma@outlook.co.nz

The Extent of the Jurassic
The Jurassic Period spanned approximately 54.1 million years, beginning about 199.6 million years ago and ending about 145.5 million years ago. It followed straight after the Triassic Period, beginning with the Triassic–Jurassic extinction event. During this event, some 20% – 35% of Triassic marine genera vanished, while most terrestrial reptiles (except crocodilians, pterosaurs and dinosaurs) also became extinct. These extinctions opened new opportunities for diversification and radiation of new species during the Jurassic.

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