[X] My Assistant

[fredk]

Our first good look through the gap:
http://qt.exploratorium.edu/mars/opportuni...0M1.JPG?sol4482

[atomoid]

It's almost as if the gulley near Oppy had to have been exhumed, it just looks too surficial to be that ancient, perhaps what we see is just a lingering remnant of its once lower reaches, though I have no idea if we know how deep these slopes have been eroded over the eons.

[marsbug]

It's almost as if the gulley near Oppy had to have been exhumed, it just looks too surficial to be that ancient, perhaps what we see is just a lingering remnant of its once lower reaches, though I have no idea if we know how deep these slopes have been eroded over the eons.

TBH my bet would be that it's more recent, and due to dust or debris flow with little or no water involved - perhaps a little lubrication to help things move if it dates from a high obliquity period, but my gut feeling is that the idea of liquid water being involved is more wh\t people are determined toi find than what is actually there.
Would be delighted to be wrong though!