The diatreme breccia pipes belong to volcanic crater phase and volcanic conduit phase, and consist of breccias and binding material.
2
晋东北地区出露一系列与燕山期富碱的酸性、中酸性浅成相-次火山相有成因联系的爆破角砾岩筒。
A series of explosive breccia pipes, related to acid rich-alkaline subvolcanic rocks of Yanshan period in origin, occur in the Northeast Shanxi Province.
3
既有溢流相，又有侵入岩相，还有次火山岩相和火山通道相；岩性主要以中酸性侵入岩为主。
They have both the flooding and the intrusive lithofacies but also have the volcanic and the volcano vent lithofacies and the lithology is mainly the middle acidic intrusive rocks.
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