PIA06898: Boulder Rings
 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:  836 x 1254 pixels (w x h)
 Produced By:  Malin Space Science Systems
 Producer ID:  MOC2-867
 Full-Res TIFF:  PIA06898.tif (1.05 MB)
 Full-Res JPEG:  PIA06898.jpg (292.5 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:

2 October 2004
This Mars Global Surveyor (MGS) Mars Orbiter Camera (MOC) image shows raised-rimmed, circular features sometimes described as "boulder rings." These are located on the vast martian northern plains, and they are, basically, somewhat filled and somewhat buried meteor impact craters. The small, dark dots on these rings are boulders derived from the craters' ejecta and perhaps from erosion of the rock in which the craters formed. This image is located near 70.4N, 310.4W, and covers an area about 3 km (1.9 mi) across. Sunlight illuminates the scene from the lower left.

Image Credit:
NASA/JPL/Malin Space Science Systems

Image Addition Date:
2004-10-02