HiRISE (NASA)  

HiRISE 4K: A Bounty of Northern Hemisphere Gullies

The orientation of these gullies is of interest because many craters only contain gullies on certain walls, such as those that are pole-facing. (See link for full cutout and additional info.)

flic.kr/p/2o4fxkp

NASA/JPL-Caltech/UArizona

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@HiRISE Looks like an alluvial deposit.

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