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‘Glowing’ Sand Dune Erosion on the Side of a Martian Crater

12 Oct 2021, 14:49 UTC
‘Glowing’ Sand Dune Erosion on the Side of a Martian Crater
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While Mars is known as the Red Planet, a variety of colors can be found on the planet’s surface. Just like on Earth, the array of colors we can see in images from Mars comes from the diverse minerals on or just under the surface.

In the case of this picture, subsurface minerals show up in gullies that have eroded down the side of a a giant sand dune.

“Some of these gullies produce a variety of colors that are highlighted on the west-facing (illuminated) slopes, where the gullies appear to be glowing in the winter light,” explains the team from the incredible HiRISE camera, on board the Mars Reconnaissance Orbiter.

Erosion in Kaiser Crater on Mars, as seen by the HiRISE camera on the Mars Reconnaissance Orbiter. Credit: NASA/JPL/UArizona.

MRO has been orbiting Mars since 2006, and HiRISE has been snapping high-resolution images, showing the diversity of Martian surface. Kaiser Crater – and the field of giant dunes inside — has been a frequent target of study for HiRISE (see all the images here), so scientists have come to recognize the seasonal changes that take place at this ever-changing and shifting landscape. The HiRISE teams says that the ...

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