more than 50 million years after the Permian Mass Extinction, another mass extinction wiped out many species of animal life. This was the Triassic Mass Extinction. Like the Permian Mass Extinction, the Triassic Mass Extinction was cause primary by volcanic activity. It all started with the break up of a continent. During this time all the continents we know today were all crammed together in the one and giant Pangea supercontinent. The slow break up of this continent caused fissures in the ground to erupt creating volcanoes. Ammonites and other shelled cephalopods were devastated. Brachiopods greatly decreased in diversity. Crocodiles relatives and dinosaur ancestors were gone. It is very likely that a asteroid helped in this dying.
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| Volcanic eruptions and asteroids are believed to be the cause of the Triassic Mass Extinction Event |
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