在过去约四千万年间,菲律宾海东缘区是欧亚、太平洋、菲律宾海等各板块相互作用的场所。马里亚纳弧和小笠原弧就位于该作用场中。两弧的起源虽然一样,但由于岛弧与岛弧或岛孤与浮动脊的碰撞,至使两弧发育生长为今天这种不同的状态。 In the past about 40 million years, the eastern coast of the Philippines is the place where the plates of Eurasia, the Pacific Ocean and the Philippine Sea interact. The Mariana Arc and the Ogasawara Arc are located in this field of action. Although the origin of the two arcs is the same, due to the collision between the island arc and the island arc or island solitary and floating ridge, the two arcs grow and develop into different states today.