Dinosaur Timeline

The dinosaurs lived many millions of years ago. About 65 millions years ago, the dinosaurs experience a mass extinction. The cause is believed to be a great volcanic eruption which led to changes on Earth, such as global warming, which led to their extinction. The following timeline shows several of the geological periods of the dinosaur.

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Timeframe (in millions of years ago)

Cenozoic Quaternary


Tertiary 65
Mesozoic Cretaceous 144
Jurassic 206
Triassic 248
Paleozoic Permian 290
Pennsylvanian 323
Mississippian 363
Devonian 409
Silurian 439
Ordovician 510
Cambrian 570


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