VOLCANIC ERUPTIONS TRIGGERED DAWN OF DINOSAUR AGE.

Volcanic activity may have played a key role in triggering the mass extinction event about 200 million years ago that set the stage for the rise of dinosaurs, an Oxford study has found. The Triassic extinction, a large mass extinction of animal life, was followed by the dinosaur era. The casualty list includes large crocodile-like reptiles and several marine invertebrates. While it remains a mystery why the dinosaurs survived this event, they went on to fill the void left by the species wiped out.
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