PIA08799: To Beat the Band
This image from NASA's Mars Global Surveyor shows layers exposed in the north polar region of Mars, underlain by a thick sequence of layered material. The layers are most commonly exposed on the slopes of troughs, believed to have formed by wind erosion.
 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:  601 x 1573 pixels (w x h) 
 Produced By:  Malin Space Science Systems 
 Producer ID:  MOC2-1599  
 Full-Res TIFF:  PIA08799.tif (946.6 kB)
 Full-Res JPEG:  PIA08799.jpg (223.9 kB)  

Click on the image above to download a moderately sized image in JPEG format (possibly reduced in size from original)

Original Caption Released with Image:

28 September 2006
This Mars Global Surveyor (MGS) Mars Orbiter Camera (MOC) image shows layers exposed in the north polar region of Mars. The north polar cap is underlain by a thick sequence of layered material. The layers are most commonly exposed on the slopes of troughs that are believed to have formed by wind erosion. The layers give a banded appearance. In this example, some of the layers are cut off (truncated) by other layers. This truncation is a classic, textbook example of an erosional unconformity, a term commonly used by geologists. The unconformity occurs when deposition of new layered material stops for a while, and erosion occurs. Then, new layers form on top of the eroded surface and the older layers, at some point in time when the erosion stops and deposition of layered material resumes.

Location near: 78.6°N, 342.0°W
Image width: ~3 km (~1.9 mi)
Illumination from: lower right
Season: Northern Spring

Image Credit:
NASA/JPL/Malin Space Science Systems

Image Addition Date:
2006-09-28