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火山岛是海底火山喷发物质堆积,并露出海面而形成的岛屿。它的面积不大,坡度较陡。分单个火山形成的岛屿,如台湾省的黄尾屿就是圆形的死火山顶;也有的则是群岛式的,如澎湖列岛就是第四纪初期火山喷发而形成的群状火山岛。
Volcanic islands are the islands formed by the accumulation of volcanic eruptions on the surface of the ocean, exposing the sea surface. It’s small area, steep slope. A single volcanic island such as the Yellowtail Island in Taiwan Province is a circular extinct volcano; others are archipelagic, such as the Penghu Islands volcano eruption was formed in the group of volcanic islands.