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火山属于堆积山,是地壳内部岩浆喷出地表堆积成的山体,典型的火山是一个锥形的山丘,称为“火山锥”。火山锥顶部有一个圆形的火山口,是火山喷发灼热的岩浆、气体等物质喷到地面的出口。火山口容易积水成湖,形成火口湖。火山口下有一条与地下岩浆相连的通道,叫做“火山通道”。火山可以分为死火山、活火山、休眠火山三种。死火山是指在人类历史时期喷发过、迄今为止没有重新喷发过的火山,例如山西大同的死火山
The volcano belongs to a pile of mountains, is the mountain of magma ejected from the surface of the crust, the typical volcano is a conical hill called “volcano cone.” The top of the volcano cone has a circular caldera, volcanic eruption of hot magma, gas and other substances to the ground outlet. Crater easily stagnant water into a lake, the formation of crater lake. Below the crater there is a passage connected to the underground magma, called the “volcano channel”. Volcanoes can be divided into extinct volcanoes, active volcanoes and dormant volcanoes. Extinct volcano refers to eruption in the history of mankind, so far no re-eruption volcanoes, such as Shanxi Datong’s volcano