The continents formed at the break - up of Pannotia and Rodinia at the end of the Proterozoic slowly moved together again , forming the supercontinent Pangaea in the late Paleozoic .
The continents formed at the break - up of Pannotia and Rodinia at the end of the Proterozoic slowly moved together again during the Paleozoic . 
 This eventually resulted in phases of mountain building that created the supercontinent Pangaea in the late Paleozoic .