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火山栓

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在圣卢西亚的Gros Piton和Petit Piton的鸟瞰图,2006年。

火山栓,海底火山爆发时,由于火山顶部是海水,喷涌而出的熔岩一旦接触到海水,便会凝固(此段基本概念與普通地質學不符,請標明來源),形成固体外壳,堵住火山口,然而有时并不能完全堵住,随着岩浆的不断溢出,常在火山口形成一个突起,而后海陆变迁,地面上的火山栓往往成为旅游圣地。著名的火山栓有加州莫洛岩石英语Morro Rock斯里兰卡锡吉里耶以及澳洲豪勋爵岛附近的金字塔山

圣卢西亚的Pitons,可以发现两个火山栓的例子,因为它们突然从东加勒比海上升(此段英文翻譯有誤)

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火山栓
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