What the Vulcanism of the Cascade Mountains tells you is that this range not only has active subduction beneath it, but that the rock layer riding on top is thin.
一连串的火山山脉告诉你的是，这个山脉不仅底下有活跃的俯冲活动，而且上面的岩石层也很薄。
What the Vulcanism of the Cascade Mountains tells you is that this range not only has active subduction beneath it, but that the rock layer riding on top is thin.
一连串的火山山脉告诉你的是，这个山脉不仅底下有活跃的俯冲活动，而且上面的岩石层也很薄。
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