Summary:
- Continents grow when microcontinents, or small continents, collide with each other or with a larger continent.
- Oceanic island arcs also collide with continents to make them grow.
- Pangaea was the last supercontinent on Earth, but it was not the first.
- Rodinia contained about 75% of the continental landmass that is present today.
- The early Earth was an active place with abundant volcanic eruptions and earthquakes.
- The remnants of these early rocks are now seen in the ancient cores of the continents.