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砾岩和角砾岩属陆源或正常沉积的粗碎屑岩,也是对形成条件“反应最为敏感”以及分布区域较为局限的一类岩石.它们的堆积地点除了陆上地区以外,还有水下的;有正常的海、湖岸线沉积,还包括特殊的冰川成因类型,甚至还有水下崩塌堆积或其滑动所诱导出的浊流砾质沉积物.这类粗碎屑岩还具有特殊的地质意义,既可以标志沉积间断或区域不整合的存在,又对认识大规模构造运动或区域地质发展极为重要.多年来,人们却对这类岩石的分类研究甚少,造成对这些岩石确切定名和进一步探讨成因上的诸多不便.
Conglomerates and breccias are terrestrial or normal-sedimentary coarse clastic rocks and are also “reaction-sensitive” to the formation conditions and a more restricted type of rocks.They have been deposited in addition to onshore areas as well as submerged ; There are normal sea and lake shoreline sediments, but also special types of glacial origin and even turbid-flow gravel deposits induced by underwater collapse or slip. Such coarse clastic rocks also have special Geological significance can not only indicate the existence of sedimentary discontinuities or regional unconformities, but also the understanding of large-scale tectonic movement or regional geological development is extremely important .For many years, people have very little research on the classification of such rocks, resulting in the exact designation of these rocks And to further explore the cause of the inconvenience.