Week of 23 October 2017 

The Evolution of Gully Features in Acidalia Planitia
The Evolution of Gully Features in Acidalia Planitia
Wherein we take a look at a crater’s gullies and try to unravel the story it has to tell.
Defrosting Dunes within Chasma Boreale
Defrosting Dunes within Chasma Boreale
This image shows a dune field in Chasma Boreale, which is a large trough that cuts into the North Polar ice cap.
Squiggles in Hellas Planitia
Squiggles in Hellas Planitia
What look like scratch marks in this picture are revealed, thanks to HiRISE resolution, to be linear gullies.
A Window into the Past
A Window into the Past
Various ideas for the origin of the layered sediments have suggested lake deposits, wind blown dust and sand, or volcanic materials.
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