In this VIS image, originally obtained using a filter sensitive to InfraRed Wavelenght and that was taken by the NASA - Mars Odyssey Orbiter on February, 21st, 2015, and during its 58.321st orbit around the Red Planet, we can see (---> better yet: understand) that the bright-toned Material that appears on the frame is warmer than the dark-toned Surfaces.
In fact, the bright-toned Material itself has moved downslope (actually, it was a Landsliding - or a Gravity Wasting - Event) from the top of this (just partially visible here) Hill, located in the Southern Hemisphere's Martian Region known as Promethei Terra. The resultant "Lobe" of "fallen" Material is - technically - called "Debris Flow Deposit".
Latitude (centered): 42,5972° South
Longitude (centered): 59,8720°‹ East
This image (which is an Original Mars Odyssey Orbiter b/w and Map-Projected frame published on the NASA - Planetary Photojournal with the ID n. PIA 19273) has been additionally processed, magnified to aid the visibility of the details, contrast enhanced and sharpened, Gamma corrected and then colorized in Absolute Natural Colors (such as the colors that a normal human eye would actually perceive if someone were onboard the NASA - Mars Odyssey Orbiter and then looked down, towards the Surface of Mars), by using an original technique created - and, in time, dramatically improved - by the Lunar Explorer Italia Team.