Tag Archives: dune

An isolated dune on Mars

Isolated dune on Mars

Close-up of Dune

Cool image time! The image above, cropped and rotated to post it here, shows a single isolated large dune inside an unnamed crater on Mars. The image was taken by Mars Odyssey on June 5. To the right is a close-up of the dune itself. Its isolated nature as well as the darkness of its sand in comparison with the surrounding territory has probably got some planetary scientists scratching their heads. Furthermore, the darker streaks that appear to flow down the dune are quite intriguing. Were they formed by briny seep water, as has been found with other seasonal dark slope streaks? Or are they evidence of sand avalanches?

I imagine that there will be an effort to monitor this dune over time, to see if it changes.


Curiosity arrives at Martian dune

Close-up of Martian dune

Curiosity has arrived at the first Martian dune ever observed up close and has begun its investigation.

The image above is a cropped version of a close up image showing the sand ripples on the surface of the dune. The press release also includes an amazing very very very close-up image of the pock-marked grain-covered surface. [link fixed]