冰火山和岩浆火山有什么不同?

克里斯·史密斯向剑桥大学的地质学家玛丽安·霍尔尼斯教授提出了这个问题……

玛丽安:不，没有。让我们稍微后退一步，讨论一下冥王星。这些信息是在过去一年左右一个像素一个像素地出现的。所以冥王星非常冷。它的表面温度大约是零下200摄氏度。那么，冥王星的表面是什么呢?它本质上是冰。水冰是相当坚硬的。就像冥王星的基岩是水冰一样。还有一些冰经常移动。 There's nitrogen ice and there's carbon monoxide ice. And then moving around, they're sublimating and then they're condensing somewhere else. The reason I'm telling you all of this is because if you look at the topography on Pluto, there are mountains and ridges and bumps, and lumps. If they're old, they've got craters on them. That's how we know they're old. They must be made of bedrock. There are these two mounds which they found. They're not mountain ranges. They're just isolated circular mounds and they're about 150 kilometres across and they're about 6 kilometres high. Now that's a pretty big mound. We've got some things vaguely similar to that like Hawaii on Earth - the biggest volcano on Earth. Anyway, there are these things. Because they're really big, they must be made of something strong. So they're probably made of water ice. They've got a central depression in the middle. They look just like a volcano, a really big hole in the middle which is what a volcano looks like. And their surface has not got many craters on it. so they're quite young, but it's got a very curious sort of hummocky texture. That's essentially all we know. It's pure speculation. We're just saying the shape of these things looks like a volcano but we don't know any more than that. It's just very exciting science.