A third type of mountain may be formed as a result of volcanic activity which occurs in regions of active fold mountain belts, such as in the Cascade Range of western North America.
第三种类型的山可能是由于火山活动形成的，一般发生在活动性褶皱带地区，如北美西部的喀斯喀特山脉。
The huge range of magnificently preserved fossils at Messel suggest that the volcanic lake was a death trap.
麦赛尔遗址所出土的大量保存极好的化石给我们提供了一个线索，火山湖正是罪魁祸首。
These islands are actually the peaks of an ancient volcanic mountain range submerged by the sea.
马尔岱夫群岛实际上是被大海淹没的一个古老火山山脉的山峰群。
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