Devils Tower is a relic of the past, when the molten rock of the earth's core forced its way to the surface to form the throat of a volcano.

魔鬼塔是过去的遗迹，当时地核的熔岩涌向地表，形成了火山的咽喉。

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Oil extraction on the edge of a volcano.

火山边上的原油开采。

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Meinstein said the harbor is the caldera of a volcano.

迈尔·斯泰恩说，港口是火山的一个喷口。

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Obsidian is a kind of black glass formed when the heat of a volcano melts the silica material in sand.

VOA: special.2009.09.16

"Any substantial eruption of a volcano has a potential to do that over a short period of time.

VOA: standard.2010.04.15

Air traffic over much of Europe came to a halt for six days because of the huge cloud of ash from a volcano in Iceland.

VOA: special.2010.04.23

In 1883, a massive eruption of a volcano on the island of Krakatoa in the Sundra Strait between Java and Sumatra began.

CNN: Wednesday,

As an example of some of the large landscapes, is a flowery interpretation of the inside of a volcano by Schaffer Designs.

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To start with, nearly all the sailing was done while we slept, giving us maximum time ashore to explore the likes of the 10, 023ft Haleakala, a one-time monster of a volcano but now a stunning, sterile ruin.

BBC: Otherworldly Hawaii, for less