The Breakup of Pangaea Pages 365-369 It is believed that Pangaea formed 300 million years ago during the Paleozoic era. During the formation the Appalachian and Ural Mountains were formed. A single continent called ______________ was surrounded by a large ocean called _______________. A triangular body of water called the _____________ ______ cut into the eastern edge or Pangaea. 250 million years ago Pangaea began to split into two pieces ________________ in the North _______________ in the South 135 million years ago they were separated by the _________ ______. This body of water eventually shrunk to become the _____________ ______. North America broke free of Eurasia. 100 million years ago- A rift developed and South America and Africa separated creating the _____________ _________. 65 million years ago –Australia and _________ separated. The Andes, Alps, and the __________ mountains also formed. India eventually crashed into __________ forming the _____________.