THEMIS: Dark streaks on the rim of Orcus Patera

Dark streaks on rim of Orcus Patera (THEMIS_IOTD_20180815)THEMIS Image of the Day, August 15, 2018. Today’s VIS image is located on the western margin of Orcus Patera. Dark slope streaks are present on most ridges in the image.

Formation of these features is linked to a change in the surface, either removal of the dusty surface revealing darker rock beneath the dust, or a volatile flow along the cliff face.

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