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雅思写作小作文流程图:火山岛的形成

2017-09-13编辑: 环球教育整理来自: 互联网

  这里为大家收集整理了雅思写作小作文高分范文:火山岛的形成。雅思写作考官范文很适合考生参考模仿,在研读及模仿过程中,可以帮助我们检验自己的写作水平,并能很好地吸收和应用优秀范文里的优秀内容。

  话题:

  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.


  满分范文

  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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