Well, calling it a "spring" may be a bit of an exaggeration...
The gullies they've noticed have probably only had flowing water once in the last decade -- and probably not for a *long* time before the last decade. After all, they're noticeable specifically because they're different from the pictures we took ten years ago. Most likely scenario is that there's a block of subsurface ice that has melted for some reason... so it's not quite liquid water under the surface, and it's only liquid for a very brief period before it either freezes or boils.
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momijizukamori
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Date: 2006-12-07 12:18 am (UTC)The gullies they've noticed have probably only had flowing water once in the last decade -- and probably not for a *long* time before the last decade. After all, they're noticeable specifically because they're different from the pictures we took ten years ago. Most likely scenario is that there's a block of subsurface ice that has melted for some reason... so it's not quite liquid water under the surface, and it's only liquid for a very brief period before it either freezes or boils.
Still very cool stuff, though. :)