Explain why the boundary between the Triassic and Jurassic periods is similar to the boundary between the Permian and Triassic periods.

Please give me the appropriate websites...NOT ANSWERS. Just Websites :)

3 answers

http://www.google.com/#q=boundaries+between+the+Permian+Triassic+and+Jurassic+periods+
Thank you Ms. Sue! I appreciate your help! :)
You're very welcome.