This NASA Mars Global Surveyor image shows a complex pattern of intersecting and overlapping troughs in the Olympica Fossae region of northern Tharsis.

20 April 2006
This Mars Global Surveyor (MGS) Mars Orbiter Camera (MOC) image shows a complex pattern of intersecting and overlapping troughs in the Olympica Fossae region of northern Tharsis. Some combination of floods, lava flows, and faulting/tectonic activity contributed to this scene, followed by mantling by dust. Dark streaks on slopes in the troughs were formed by dust avalanches.

Location near: 24.8°N, 114.8°W
Image width: ~3 km (~1.9 mi)
Illumination from: lower left
Season: Northern Winter

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