PIA03037: Dike near Auqakuh
 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 1744 pixels (w x h)
 Produced By:  Malin Space Science Systems
 Producer ID:  MOC2-1249
 Full-Res TIFF:  PIA03037.tif (1.173 MB)
 Full-Res JPEG:  PIA03037.jpg (170.6 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:

13 October 2005
This Mars Global Surveyor (MGS) Mars Orbiter Camera (MOC) image shows a dike exhumed by erosion from beneath the cratered terrain near Auqakuh Vallis in northeastern Arabia Terra. The dike is the narrow, discontinuous ridge that cuts diagonally from the northwest (upper left) toward the southeast (lower right) across the scene. Typically, a dike is formed underground when molten rock -- magma -- is injected through a crack or fault. The magma eventually cools and hardens. A dike can also sometimes form in a non-volcanic setting by injection of wet sediment (which later hardens to rock) into an overlying sedimentary layer. The ridge is formed later, when surrounding rocks are eroded away, leaving the more erosion-resistant rock behind as a ridge. For an example on Earth, the famous Shiprock in northwestern New Mexico, U.S.A., has several dikes associated with it.

Location near: 31.4°N, 299.0°W
Image width: width: ~3 km (~1.9 mi)
Illumination from: lower left
Season: Northern Winter

Image Credit:
NASA/JPL/Malin Space Science Systems

Image Addition Date:
2005-10-13