Before Pangea, what? — science newsSeptember 30, 1972
The continents as we know them arose when the protocontinent Pangea broke apart and its fragments made the long, slow journey to their current positions. The process took about 200 million years. But the earth’s crust is estimated to be 4.5 billion years old… [Scientists are exploring] the puzzling problem of what happened during the billions of years before Pangea fell apart.
The continents have an intermittent relationship that has existed since long before Pangea, evidence from fossils and rocks shows. Most scientists agree that the first known supercontinent, called Nuna, formed about 1.5 billion years ago. parted and reunited as the supercontinent Rodinia about a billion years ago. A third supercontinent called Pannotia may have formed approximately 600 million years ago. near the South Pole, but its the existence is debated. Today, scientists predict how the continents will merge in the future. A could form a supercontinent called Amasia 250 million years from now when the continents drift toward the North Pole (SN: 01/21/17, p. 18).