A massive extinction event that cleared the way for dinosaurs to spread and diversify at the end of the Triassic period was caused by periods of volcanic eruptions. That’s the conclusion of new research on a vast field of igneous rock covering four continents, supporting a hypothesis that states global climate change was responsible for the end of three quarters of the world’s species 200 million years ago.
http://www.sciencealert.com/volcanic-eruptions-changed-the-climate-and-cleared-the-way-for-dinosaurs
