NASA's Mars Global Surveyor shows linear and barchan sand dunes in Chasma Boreale, a broad erosional trough in the martian north polar region.

30 March 2005
This Mars Global Surveyor (MGS) Mars Orbiter Camera (MOC) image shows linear and barchan sand dunes in Chasma Boreale, a broad erosional trough in the martian north polar region. Winds responsible for these dunes generally blow from upper right toward the lower left. Martian dunes tend to be darker than their counterparts on Earth because they are composed of darker, iron-bearing minerals and rock fragments.

Location near: 84.2°N, 37.9°W
Image width: ~3 km (~1.9 mi)
Illumination from: lower left
Season: Northern Summer

View all Images