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Top雅思在线雅思频道整理了《2021雅思写作Task1小作文柱状图范文：火山岛的形成》，希望对大家的2021雅思备考有所帮助。
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.
雅思考前能力水平测试（0元领课）
考前测评 了解真实的雅思水平 |
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