Were There Any Mass Extinctions During The Triassic Period?

Were There Any Mass Extinctions During The Triassic Period? Huge and widespread volcanic eruptions triggered the end-Triassic extinction. … More than 200 million years ago, a massive extinction decimated 76 percent of marine and terrestrial species, marking the end of the Triassic period and the onset of the Jurassic. What periods were the mass extinctions?