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火山口

出自维基百科,自由个百科全书

火山口火山活动辰光地下高温物质喷到地面个出口。

火山口一般垃拉火山锥顶部或侧面,拉火山喷发停止后由于地下通道中个熔岩冷凝收缩,火山口形成环形凹陷个区域;口内有陡峭个内壁,拉平面上常呈椭圆形或圆形,直径从数十米到数公里弗等。

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