雅思写作小作文高分范文-火山岛的形成
2017/7/28 16:53:54来源：新航道作者：新航道
摘要：雅思写作是中国考生们的一大头疼科目，难以提高的科目.上海新航道雅思小编雅思写作小作文高分范文-火山岛的形成，希望帮助考生对照写作范文研究真题，充分备考，争取理想成绩，实现留学梦想。
雅思写作是中国考生们的一大头疼科目，难以提高的科目.上海新航道雅思小编雅思写作小作文高分范文-火山岛的形成，希望帮助考生对照写作范文研究真题，充分备考，争取理想成绩，实现留学梦想。
雅思写作小作文题目：
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.
雅思写作小作文范文：
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.
以上就是小编给大家分享的雅思写作小作文范文汇总，通过范文可以有效帮助大家备考雅思写作考试，争取理想成绩，实现留学梦想。
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