The crater in residual volcanic activity that the volcanic cone within.

此火山口里有个显示残馀火山活动的内火山锥。

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The volcanic form of complete preservation (a crater, volcanic cone) has 25, volcanic cone types and diverse.

其中火山形态保存完整（有火山口、火山锥）的有25座，火山锥类型多样。

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This distinctive morphology is usually associated with oceanic islands formed by volcanoes; coral reefs become established around the partially submerged volcanic cone.

这种独特的地貌形态通常与大洋中的火山岛相关，珊瑚礁最初在局部被淹没的火山锥周围形成。

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But walking across the dark volcanic rocks with the snow cone of Mt Erebus behind and the sound of penguins braying along the sea ice of the sound, it is easy to imagine yourself transported back to the early years of the last century, for this is a timeless landscape.

BBC: In the footsteps of Shackleton