pyroclasitc rocks的用法和樣例：
例句
- Dolomite and volcaniclastic rocks of Fengcheng formation are also good reservoirs.
風城組的白雲岩及火山碎屑岩的分佈部位也為良好的儲層。 - 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.
中國學者提出的火山碎屑岩分類時間較早，有自己特色，在一定的範圍得到了應用。
