which island of the hawaiian island chain is the youngest
Hawaiian Islands Hawaiʻi island (the Big Island) is the biggest and youngest island in the chain, built from five volcanoes. Mauna Loa, taking up over half of the Big Island, is the largest shield volcano on the Earth. The measurement from sea level to summit is more than 2.5 miles (4 km), from sea level to sea floor about 3.1 miles (5 km).[21]
List of islands of New Zealand The two main islands, which are much larger than the rest and where most of the population lives, are the North Island, or Te Ika-a-Māui, and the South Island, or Te Waipounamu. The latter is often referred to as the "mainland", especially by its residents, because it is somewhat larger (but with a smaller population). However, in general practice, the mainland refers to both North Island and South Island as opposed to the smaller offshore islands.