"That's your Permo-Triassic transition zone ... today in regions that lack good circulation. Local die-offs of marine life can result. But Wignall suspects that the entire ocean may have stagnated ...

The Permian-Triassic extinction, also known as the Great Dying, was the most devastating event in Earth’s history. 96% of marine life and 70% of terrestrial vertebrates vanished around 252 ...

Life in the Triassic period had a rough start ... Dinosaur embryo found curled up and ready to hatch like a bird In the Triassic ocean, marine reptiles such as the plesiosaurs were kings.