雅思考试中写作部分的考察很重要，又很难在短时间内提分，就更需要大家用功在平时。下面是听力课堂小编整理的雅思作文范文:火山岛的形成的资料，平时多看多练，考试正常发挥就好。

　　The diagram shows the growth cycle of a volcanic island. Write a 150-word report for a university lecturer describing the main features of the cycle.

　　参考范文：

　　The diagram illustrates a natural process in which a volcanic island grows from beneath the sea, explodes, and then eventually sinks to become an underwater reef. The process is divided into nine stages.

　　In the first two stages, called the ‘preshield’ and ‘protoshield’ stages, a mountain gradually builds under the surface of the sea. In the third or ‘explosive’ phase, hydro-explosions occur which deposit a cone of ash. A large number of cinder cones then pile up to form a ‘shield’ on top of the volcano.

　　This shield gradually erodes and subsides to form reefs below the surface of the sea. However, there may be ongoing volcanic activity including lava flows. By the time of the ‘coral atoll’ stage, the original form of the volcano has disappeared, and the whole structure sinks further under the sea during the ‘guyot’ stage.

　　In summary, huge volcanoes rise and fall under the sea in a natural process known as the volcanic island growth cycle.

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