E
exoscientist
Guest
<p> I wrote about these before:</p>A new class of Mars gullies.<br />exoscientist<br />asteroid<br />03/10/07 04:47 PM<p>http://uplink.space.com/showthreaded.php?Cat=&Board=sciastro&Number=680608</p><p> Below is one of the MGS images showing the ridges in Tharsis: </p><p> </p><p> <img src="http://sitelife.space.com/ver1.0/Content/images/store/10/15/ba8eb889-c683-41b3-afd6-e42a6f57c60d.Medium.jpg" alt="" /><br /> </p><p> I'm not sure about the argument I made in that prior post that there are gullies on the ridges. Still I would like to see a Hirise image of the area.</p><p> Here is a Hirise image that shows ridges in Aeolis that might be similar to those in Tharsis:</p><p> <br /> <img src="http://sitelife.space.com/ver1.0/Content/images/store/15/15/8f6b47ce-caaa-439e-9fbc-cb7b8b47709e.Medium.jpg" alt="" /><br /> </p><p> </p><p> The ridges have the look of glacial moraines. There has been evidence of remnant glacial ice in both Tharsis and Aeolis which survives at these near equatorial sites under a dust cover.</p><p> </p> Bob Clark <div class="Discussion_UserSignature"> </div>