Candor Chasma
Jet Propulsion Laboratory https://www.jpl.nasa.gov/ March 13, 1998
Complex central deposits in the floor of the Candor Chasma section of Vallis Marineris. This 3.3 x 3.1 km image (frame 8405) is centered near 6.7 degrees south, 75.4 degrees west.
Figure caption from Science Magazine.