PIA06369: Wind Erosion in Tithonium
 Target Name:  Mars
 Is a satellite of:  Sol (our sun)
 Mission:  Mars Global Surveyor (MGS)
 Spacecraft:  Mars Global Surveyor Orbiter
 Instrument:  Mars Orbiter Camera (MOC)
 Product Size:  2048 x 3072 pixels (w x h)
 Produced By:  Malin Space Science Systems
 Producer ID:  MOC2-782
 Full-Res TIFF:  PIA06369.tif (6.298 MB)
 Full-Res JPEG:  PIA06369.jpg (1.393 MB)

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Original Caption Released with Image:

9 July 2004
The processes that have eroded and exposed sedimentary rock outcrops in many of the Valles Marineris troughs are unclear. However, this Mars Global Surveyor (MGS) Mars Orbiter Camera (MOC) image shows an example from western Tithonium Chasma that is unambiguous. The ridges are yardangs, an erosional form created by wind. To acquire the characteristic shape of a yardang, the material being eroded must contain some amount of sand. As weathering processes loosen sand grains from the outcrop, they become available to be picked up and transported away by wind. In the case shown here, the dominant, rock-eroding winds came from the top/upper right (north). This view of eroded sedimentary rock in western Valles Marineris is located near 4.6S, 89.1W. At 1.5 meters (5 feet) per pixel, this image covers an area about 3 km (1.9 mi) wide, and is illuminated by sunlight from the left.

Image Credit:
NASA/JPL/Malin Space Science Systems

Image Addition Date: