火山喷发的四种类型□周满品／兰州市文科职业学校火山爆发是地热或内能释放的强烈显示。地球内部的地热积累到一定程度，灼热的岩浆在强大的内压力作用下，沿着地壳薄弱带，喷出地表，形成景象壮观的火山喷发现象。平静的火山，可见通红的岩浆翻滚，好象沸腾的开水，熔熔... The four types of volcanic eruption, Zhou Man Pin / Lanzhou City Liberal Arts Vocational School volcanic eruption is a strong indication of geothermal or internal energy release. Earth’s internal geothermal heat accumulates to a certain extent. The hot magma under the strong internal pressure, along the weak zone of the earth’s crust, spouts the surface and forms a spectacular volcanic spray. In the calm volcano, red magma can be seen rolling, like boiling water, melting...