A third type of mountain may be formed as a result of volcanic activity which occurs in regions of activefold 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。
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A third type of mountain may be formed as aresult of volcanic activity which occurs in regions of activefold mountain belts, such as in the Cascade Range of western North America.