pyroclasitc rocks的用法和样例：
例句
- Dolomite and volcaniclastic rocks of Fengcheng formation are also good reservoirs.
风城组的白云岩及火山碎屑岩的分布部位也为良好的储层。 - On the basis of the past schemes, new classifications of pyroclasts and the petrographic as well as the petrogenetic classification of pyroclastic rocks are proposed in this paper.
中国学者提出的火山碎屑岩分类时间较早，有自己特色，在一定的范围得到了应用。
