This image from NASA's Mars Global Surveyor spacecraft polygonally patterned ground on the floor of a trough in the southern hemisphere of Mars. The polygons could be an indicator that ground ice is or was present at this location.

2 February 2006
This Mars Global Surveyor (MGS) Mars Orbiter Camera (MOC) image shows polygonally patterned ground on the floor of a trough in the southern hemisphere of Mars. The polygons could be an indicator that ground ice is or was present at this location. The dark streaks were formed by passing dust devils.

Location near: 67.4°S, 240.3°W
Image width: ~3 km (~1.9 mi)
Illumination from: upper left
Season: Southern Summer

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