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Originally posted by robertfenix
A volcanic event on the moon allowed trapped gases and other compounds to event above the surface, but the cold atmosphere quickly cooled the outer core of the gaseous plume, while maintaining a hotter inner core, periodically the spire would spurt a hot jet of material from the top and it would cool forming a lunar stalagmite.
Who knows what the material composition of it is or even if its still there. But at 1.5 Miles that thing is huge. Low G's on the surface allow for some pretty amazing things to happen