The Triassic Period existed about 245 to 201 million years ago, and it was a time of transition. It took place when the when the world-continent of Pangaea existed. The Triassic Period follows the largest extinction event in the history of life. There weren't any dinosaurs at the beginning of the Triassic, but there were amphibians and reptiles. The Triassic's climate was very hot and dry with strong seasonality. Turtles, frogs, salamanders and lizards appeared during the Triassic Period. Seed ferns like the Glossopteris dominated the terrain of the Triassic, but later dwindled to extinction..
The Triassic Period was named in 1834 by the German geologist Friedrich August Von Alberti. The Triassic Period ended with a mass extinction followed by huge volcanic eruptions. Nobody really knows what happened to cause this extinction, but they think that some possibilities could be global cooling or an asteroid impact. Because of this extinction dinosaurs would later become increasingly dominant and remain that way for the next 150 million years.