HiRISE 3D: A Ridge in a Lava Flow
This ridge appears to be the contact between adjacent lava flow units. Stereo will help discern the overlapping relationships and morphology of the contact.
Full image: https://www.uahirise.org/anaglyph/ESP_084550_2075_ESP_084774_2075_RED
NASA/JPL-Caltech/University of Arizona