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通过火山碎屑岩宏观和镜下特征的研究补充了火山碎屑岩的分类,叙述了它的类型和分布以及对成煤作用的影响,从而进一步揭示了华北石炭二叠系火山碎屑岩的存在。
The study of macroscopic and microscopic features of pyroclastic rocks supplements the classification of volcaniclastic rocks, describes its type and distribution and its effect on coal formation, thus further revealing the volcaniclastic features of the Carboniferous Permian in North China exist.