In this VIS image, taken by the NASA - Mars Odyssey Orbiter on June, 3rd, 2004, and during its 10.953rd orbit around the Red Planet, we can see a portion of one huge and dark (---> gray) Dunefield located on the otherwise (relatively) bright and flat Floor of Pettit Crater.
Pettit Crater is located in the Amazonis Quadrangle of Mars, and centered at 12,39° North Latitude and 173,87° West Longitude. It is approxs. 92,49 Km (such as about 57,436 miles) in diameter and it was so named after Edison Pettit, an American Astronomer (who was born in Peru, Nebraska - USA - on September, 22, 1889 and died - location unknown - on May, 2nd,1962. Just out of curiosity, even the actual location of his body is still unknown).
Latitude (centered): 11,7976° North
Longitude (centered): 185,8840° 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 19777) has been additionally processed, magnified to aid the visibility of the details, extra-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.