Between the original Proterozoic rifting of Rodinia and the Late Paleozoic rifting or Pangaea, how much "real estate" was added to the North American continent?

Question

Quizplus · Accepted Answer

The correct answer is the entire width of the Appalachian Orogen, St. Lawrence Seaway through Nova Scotia, which is approximately 600-800 km. This addition occurred due to the closure of the Iapetus Ocean and the subsequent collision of landmasses that formed the Appalachian Mountains, significantly contributing to the growth of the North American continent.

Between the Original Proterozoic Rifting of Rodinia and the Late