In this simply super-clear, well defined, and beautiful VIS image, obtained by the NASA - Mars Odyssey Orbiter on August, 5th, 2009, during its 33.902nd orbit around the Red Planet, we can see a small part of the Floor of an Unnamed Impact Crater located in the Southern Martian Region known as Terra Sirenum.
The gray colored Area (please, look at the upper portion of the picture) is (better yet: should be) covered by Basaltic Sand and Dust. Furthermore - and as a matter of fact - it is hard for us, as IPF, to define (just by using this image) the true nature of what seems to be a medium-sized Channel that is very well visible in the lower portion of the frame.
Latitude (centered at approx.): 27,4309° South
Longitude (centered): 180,2930° East
This image (which is an Original Mars Odyssey Orbiter falsely colored and Map-Projected frame published on the NASA - Planetary Photojournal with the ID n. PIA 20246) has been additionally processed, magnified to aid the visibility of the details, contrast enhanced and sharpened, Gamma corrected and then re-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.