Bonus HiRISE 3D: Possible Sulfate-Rich Terrain in Northeast Syrtis Major
Sulfates have been discovered beneath the northeast margin of the Syrtis lava flows and HiRISE DTMs are required to differentiate sedimentary vs volcanic origin.
https://www.uahirise.org/anaglyph/ESP_043172_1970_ESP_042750_1970_RED
NASA/JPL-Caltech/UArizona