Bonin Islands Pacific Plate is subducting under the Philippine Sea Plate, which creates an oceanic trench to the east of the islands: the Bonin Trench. The crust of the Ogasawara Islands was formed by volcanic activity when subduction began 45–50 million years ago, and is composed mostly of an andesitic volcanic rock called boninite, which is rich in magnesium oxide, chromium, and silicon dioxide. The Ogasawara Islands may represent the exposed parts of an ophiolite that has not yet been emplaced on oceanic crust. The rocks of the Volcano Islands are much younger; Iwo Jima is a dormant volcano characterized by rapid
Volcano House, Iceland Opal, Obsidian, Rock crystal and Iceland spar. Volcano House offers guidance and information throughout the exhibit. The interior design of the exhibition is meant to look like it's from 1973 which is the year when the volcanic eruption in Heimaey in the Westman Islands occurred. The Volcano House cinema presents two documentaries covering two of the most powerful volcanic eruptions that have occurred in Iceland over the last 40 years - the 1973 eruption in Heimaey on the Westman Islands, and the 2010 eruption of Eyjafjallajökull in South Iceland. The documentaries are exclusively made for Volcano House and can not