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Mars Science

Mars' Reull Vallis: a River Ran Through It 41

Posted by Soulskill
from the brad-pitt-passed-on-this-one dept.
Press2ToContinue sends this quote from a European Space Agency news release: "ESA's Mars Express imaged the striking upper part of the Reull Vallis region of Mars with its high-resolution stereo camera last year. Reull Vallis, the river-like structure in these images, is believed to have formed when running water flowed in the distant martian past, cutting a steep-sided channel through the Promethei Terra Highlands before running on towards the floor of the vast Hellas basin. This sinuous structure, which stretches for almost 1500 km across the martian landscape, is flanked by numerous tributaries, one of which can be clearly seen cutting in to the main valley towards the upper (north) side."
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Mars' Reull Vallis: a River Ran Through It

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  • by Anonymous Coward on Friday January 18, 2013 @07:21PM (#42630399)

    I thought TFA talked about how water stopped flowing during the Hesperian period or something, and was around 2-3ish billion years ago. The reason the impact craters don't appear in the stream bed is also in the article - that ice and debris flowed afterwards in glacial fashion down the river carving into the wall and floor of the existing bed. At least, that's how I read it.. I could be wrong and stuff.

"Pay no attention to the man behind the curtain." -- The Wizard Of Oz