Rodinia existed between 1.1 billion and 750 million years ago. It formed from parts of an older and poorly understood supercontinent. Rodinia broke up in the first period of the Neoproterozoic, the Tonian. Later its continental fragments were re-assembled to form Pangaea 300–250 million years ago.Is North America part of Rodinia?
Artist’s conception of the supercontinent Rodinia as it began to fragment 750 million years ago. The future North America lies in the center of the surrounding lands. The breakup of this giant continent was the beginning of Pacific Northwest geologic history. Original painting by Tomo Narashima.What was the paleogeography like before the formation of Rodinia?
Little is known about the paleogeography before the formation of Rodinia. Paleomagnetic and geologic data are only definite enough to form reconstructions from the breakup of Rodinia onwards. Rodinia is considered to have formed between 1.3 and 1.23 billion years ago and broke up again before 750 million years ago.Is Rodinia a supercontinent?
"The Proterozoic supercontinent Rodinia: paleomagnetically derived reconstructions for 1100 to 800 Ma". Earth and Planetary Science Letters. 154 (1): 13–24. Bibcode: 1998E&PSL.154...13W. doi: 10.1016/S0012-821X (97)00127-1.