HiRISE (NASA)
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HiRISE 3D: Dune Gullies in Matara Crater

Repeat imaging of the dunes in this crater shows that material towards the top of the gullies has moved downslope, and the channel beds may have widened over time.

uahirise.org/anaglyph/ESP_0200
NASA/JPL-Caltech/UArizona

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