Relatively dark slope streaks are common on steep dust-mantled slopes of Mars. When imaged under high sun illumination they appear to be just a dark stain without topographic relief.
However, when imaged with the sun low in the sky (and at high resolution), we can clearly see the topographic signature
. Surface material has been removed from the upper slopes and deposited in lobes, as expected from landslides (also called “mass movements”). ID
: 20 January 2021 altitude
: 275 km
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