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Martian subsurface, from orbit, sub surface geology
morganism
post Oct 10 2012, 01:31 AM
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from HiRise data . abstract only

http://adsabs.harvard.edu/abs/2012Icar..221..436Q


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Thomas Gold was probably right about a iceball Mars.....
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DFinfrock
post Dec 11 2012, 05:10 PM
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Here's a link to another interesting article on the Martian sub-surface, posted just this week. It shows views of drainage channels flowing acroos the surface, and seemingly terminating in large caverns. Indications are that the caverns were carved in permafrost, which the article states has a similar permeability to limestone.

http://www.redorbit.com/news/space/1112742...d-water-120512/
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DFinfrock
post Dec 11 2012, 05:32 PM
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Here are the images, courtesy of the Planetary Science Institute

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