When was the Triassic Period?
Welcome to Quatr.us Study Guides!

Triassic Period

During the Triassic period (about 248 to 199 million years ago), most of Earth's land continued to stick together in one big supercontinent, Pangaea. Because the middle of Pangaea was so far from the oceans, it was very dry there, like a desert. The whole world was generally pretty warm all through the Triassic period. Even at the North and South poles, there wasn't any ice.

Because it was warm and dry, the older plants like giant ferns that needed wet ground for their spores to make new plants didn't do well in the Triassic. Most of the ferns died out, while the new pine trees took over as the main plants on Earth, even at the North and South poles. Ginko trees also developed, and possibly the first flowers.

The types of plants and animals were different in southern Pangaea than they were in the north. In the south, there were a lot of warm-blooded reptiles, but the north had more cold-blooded reptiles like the turtles that evolved about 215 million years ago. Throughout this period, the cold-blooded reptiles generally did better than the warm-blooded reptiles. But at the very end of the Triassic, about 200 million years ago, the warm-blooded reptiles evolved into the first flying reptiles - the pterodactyls - and others evolved into the first mammals. Another catastrophe that killed many types of plants and animals about this time (possibly because of big volcanic eruptions as Pangaea began to pull itself apart) marks the transition to the Jurassic period.

Learn by doing: go see a dinosaur skeleton in a museum
More about the Jurassic Era

Bibliography and further reading about the Triassic period and geology:

List of Geological Eras
Quatr.us home

LIMITED TIME OFFER FOR TEACHERS: Using this article with your class? Show us your class page where you're using this article, and we'll send you a free subscription so all your students can use Quatr.us Study Guides with no distractions! (Not a teacher? Paid subscriptions are also available for just $16/year!)
Please help other teachers and students find us: link to this page from your class page.
Karen Carr is Associate Professor Emerita, Department of History, Portland State University. She holds a doctorate in Classical Art and Archaeology from the University of Michigan. Follow her on Instagram or Twitter, or buy her book, Vandals to Visigoths.
Cite this page
  • Author: K.E. Carr
  • Title:
  • Site Name: Quatr.us Study Guides
  • Publisher: Quatr.us
  • Date Published:
Did you find what you needed? Ask your teacher to link to this page so other people can use it too! Send it in and win a Quatr.us "Great Page!" award!
Sign up for more free articles and special offers in Quatr.us' weekly newsletter:
We will never share your e-mail address unless you allow us to do so. View our privacy policy. Easy unsubscribe links are provided in every email.
Comment on This Article

Does your class page honor diversity, celebrate feminism, and support people of color, LBGTQ people, and people with disabilities? Let us know, and we'll send you a Diversity Banner you can proudly display!
Looking for more?
Quatr.us is loading comments...
(Comments will appear after moderation, if they are kind and helpful. Feel free to ask questions, and we'll try to answer them.)
Cite this page
  • Carr, K.E. . Quatr.us Study Guides, . Web. 29 March, 2017