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为了加强火山岩地区的区域地质调查、找矿勘探,以及资料对比和综合研究工作,统一分类方案和命名原则是非常必要的。目前我国在不同范围内使用过的火山碎屑岩的分类方案较多,这些方案虽然具体划分还存在不少差别,但在一些基本方面有共同点或者比较接近,因此本着求大同存小异的精神,在实践中逐步统一分类命名的大界线,
In order to strengthen the regional geological survey, prospecting exploration, data comparison and comprehensive research in volcanic areas, it is necessary to unify the classification scheme and nomenclature. At present, there are many classification schemes of volcaniclastic rocks used in different scopes in our country. Although there are still some differences in the concrete classification of these schemes, there are some common aspects or similarities in some basic aspects. Therefore, Spirit, in practice, gradually unified classification of the big boundary line,