This NASA Mars Global Surveyor image shows partially-filled collapse pits on the eastern flank of Alba Patera, a large volcano in northern Tharsis.

14 May 2006
This Mars Global Surveyor (MGS) Mars Orbiter Camera (MOC) image shows partially-filled collapse pits on the eastern flank of Alba Patera, a large volcano in northern Tharsis. The three pits near the bottom (south) of the image have collapsed to the point of coalescence, while the northern-most pit remains largely a separate entity.

Location near: 38.5°N, 103.8°W
Image width: ~3 km (~1.9 mi)
Illumination from: lower left
Season: Northern Spring

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