Learn about the time period that took place 251 to 199 million ... all the Earth's landmasses had coalesced to form Pangaea, a supercontinent shaped like a giant C that straddled the Equator ...

In that time period, there were two supercontinents: first, Rodinia, which formed around 1.2 billion years ago and broke up approximately 750 million years ago, and Pangaea, which formed about 335 ...