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
Tourism in the Canary Islands Site that is the third largest volcano in the world from its base, El Teide. Teide is the most visited national park in Spain, with a total of 2.8 million visitors, according to the Instituto Canario de Estadística (ISTAC), and it is one of the most visited National Parks in the world. Gran Canaria has the biggest city in the Canary Islands, Las Palmas. Gran Canaria receives approximately 4 million tourists every year. Maspalomas is one of the most famous tourist attractions. This island is considered to have the best weather in the Canary Islands and some of the best