Final answer:
Hawaiian-type calderas form due to hotspot volcanic activity. The Hawaiian islands are a result of the Hawaiian hotspot, which has been active for at least 100 million years and has generated a long chain of volcanic islands.
Step-by-step explanation:
Hawaiian-type calderas form due to hotspot volcanic activity. Hotspots are areas far from plate boundaries where heat from the Earth's interior rises. As tectonic plates move, they pass over these hotspots, causing volcanic activity. The Hawaiian islands are a result of the Hawaiian hotspot, which has been active for at least 100 million years and has generated a long chain of volcanic islands.