岩浆从岩浆库穿过地下岩层经火山口或溢出口流出地面的通道。火山通道的形状与火山喷发的类型有关。中心式喷发的常具有一个主要的通道，铅直方向，似圆筒状，一般称之为火山筒或火山管。裂隙式喷发型的通道常呈长条状或不规岩浆从岩浆库穿过地下岩层经火山口或溢出口流出地面的通道。
火山通道相主要发育节理缝和各种原生裂隙。
Joint fissures and various primary fractures are mainly developed in volcanic conduit facies.
火山活动特征是从爆发转向喷溢，最后以侵出形式挤出火山通道。
The volcanic activities occurred from explosion, through eruption to extrusion at last.
山东昌乐地区死火山群火山通道相节理非常发育，形态独特，引人注目。
There are many noticeable and well-developed joints in the volcanic crater group in the Changle area, and they are unique in shape.
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