PIA07079: Inverted Valley in Arabia
 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:  672 x 4015 pixels (w x h)
 Produced By:  Malin Space Science Systems
 Producer ID:  MOC2-920
 Full-Res TIFF:  PIA07079.tif (2.701 MB)
 Full-Res JPEG:  PIA07079.jpg (797.8 kB)

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Original Caption Released with Image:

24 November 2004
Ancient valleys that may once have been the conduits through which water flowed are common on the surface of Mars. They are also found--filled and buried--in the subsurface, preserved in the rock record. In addition, erosion may take what was once the floor of a valley and leave it as a high-standing, flat-topped ridge. This Mars Global Surveyor (MGS) Mars Orbiter Camera (MOC) image shows a valley in eastern Arabia Terra that, in just one picture, exhibits both negative and positive relief forms. In negative relief, the valley is just that--a valley. In positive relief, instead of a valley, the former floor is now the top of a broad ridge. This MOC image is particularly instructive, because the transition from negative to positive (then back to negative and then again to positive) relief is captured in one small area. These landforms are located near 32.5N, 314.1W. The image covers an area about 3 km (1.9 mi) wide. Sunlight illuminates the scene from the lower left.

Image Credit:
NASA/JPL/Malin Space Science Systems

Image Addition Date: