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
Japanese occupation of the Andaman Islands Renusakai, and chief of police Mitsubashi, both of whom had served at Nanking. 600 people were arrested and tortured, including Dr. Diwan Singh, who died as a result of his injuries. At this stage the Japanese decided that Bakshi was no longer useful, and he was imprisoned. On December 29, 1943, political control of the islands was passed to the Azad Hind government of Subhas Chandra Bose. Bose visited Port Blair to raise the tricolour flag of the Indian National Army. During this, his only visit to the Andamans, he was kept carefully screened from the local population by the