火山是由地球深处的岩浆等高温物质穿过地壳裂缝,喷出地面而形成的锥形山体。地球学上又称堆积山。火山通常是一座锥形孤立山峰,顶部有凹形洼地,即火山口。火山口下有一与地壳深处相连的通道,即火山颈。火山可分活火山与死火山。人类历史记载中没有喷发过的火山称作死火山;有史以来经常或周期性 Volcanoes are pyramidal mountains formed by the extremes of the Earth’s magma and other high-temperature materials that penetrate crustal cracks and spill out of the ground. Geoscience also known as pile mountain. Volcano is usually a cone-shaped isolated peaks, the top of a concave depression, that caldera. Below the crater there is a channel connected to the deep crust, the volcanic neck. Volcano can be divided into active volcano and extinct volcano. Volcanoes that have not been erupted in human history are called extinct volcanoes; ever or periodically