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Fig. 6


Revelation of sharp topography indicating removal of overlying dust cover between November 13, 2014 (a) and March 28, 2015 (b). The area in the upper red rectangle showed clear-cut furrow-like relief that was indistinct earlier on. The roughness of the surface area within the lower red rectangle had increased around the honeycomb MAT05 (in shadow in (b)). A trench, indicated by the red arrow, had emerged along the foot of a scarp previously veiled by the dust deposits. The observation in (a) was taken at the phase angle of 82◦ with the pixel resolution of 0.62 m. b) was taken at the phase angle of 68◦ with the pixel resolution of 0.5 m (Table A.1).

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