PIA05025: Fretted Terrain Valley Floor
 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 1008 pixels (w x h)
 Produced By:  Malin Space Science Systems
 Producer ID:  MOC2-590
 Full-Res TIFF:  PIA05025.tif (678.3 kB)
 Full-Res JPEG:  PIA05025.jpg (237.8 kB)

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Original Caption Released with Image:

30 December 2003
This December 2003 Mars Global Surveyor (MGS) Mars Orbiter Camera (MOC) image shows lineated textures on the floor of a valley in the Deuteronilus region of Mars. Deuteronilus, and neighboring Protonilus and Nilosyrtis, have been known since the Mariner 9 mission as regions of "fretted terrain." In this context, "fretted" does not mean "worried," it means "eroded." The fretted terrains of Mars are regions along the boundary between cratered highlands and northern lowland plains that have been broken-down into mesas, buttes, and valleys. On the floors of some of these valleys occurs a distinctive lineated and pitted texture--like the example shown here. The cause of the textures is not known, although for decades some scientists have speculated that ice is involved. While this is possible, it is far from a demonstrated fact. This picture is located near 40.1N, 335.1W, and covers an area approximately 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: