volcanism怎么读：['vɔlkənizəm]
volcanism是什么意思：n. 火山作用
volcanism的例句和用法
1. Periods of volcanism are indicated by the presence of pyroclastic material in the formation.
群系中火成碎屑物的存在表明了火山酌的形成年代。
2. Such findings would imply that a new cycle of volcanism had commenced—and that the newly engorged magma chamber had more potential to explode catastrophically.
这样的发现表示新一波的火山作用已经开始，而重新填满的岩浆库，更有可能造成灾难性的爆发。
3. The iridium layer commonly used to support catastrophism fits into this theory as evidence for the extreme volcanism that would have been produced by the eruption of Larasia and Gondwana.
至于那个支持灾变说的铱异常层，则可能是拉拉西亚和冈纳德万喷发时特别强大的火山作用的产物。
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