Dunes on the Move

Scaled Image

Image Credit: NASA/JPL/ASU

About this image

Located in the center of this VIS image is a group of sand dunes. With enough wind and sand, sand dunes are formed. Dune morphology typically has a shallow slope on the side the wind is blowing from and a steep face on the other side. The darker part of the dunes in this image are the steep slopes. Wind blows sand particles up the shallow slope and then the particles 'fall' off the crest of the dune down the steep side. With time, the constant wind will move the crest of the dune forward. Depending on the amount of available sand, dunes can grow to large heights and sizes. In the case of this image, the dunes are moving toward the top of the image, which means up the surface slope. In cases like this, the dunes 'climb' up hills.

Please see the THEMIS Data Citation Note for details on crediting THEMIS images. 


Image ID: 
V74955010 (View data in Mars Image Explorer)
2018-11-07 00:56
Fri, 2018-12-28
1024 pixels (17 km)
3648 pixels (62 km)
0.017237 km/pixel
0.0172964 km/pixel


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