9分雅思图表小作文范文全集之流程图 火山岛

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9分雅思范文之流程图 火山岛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.

真题传送门：2017全年雅思写作真题范文大汇总（第一时间更新）

范文集结：全部15篇9分雅思流程图范文汇总放送

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.

(194 words, IELTS 9.0)