Ice Surfaces In False Color

In false color THEMIS images at high latitudes ice/frost will typically appear as bright blue in color; dust mantled ice will appear in tones of red/orange. This full resolution image shows a marked difference in the 'blueness' of the ice surfaces. The lower (presumably older) surface is oranger and the top (presumably younger) surface is blue. This may represent the fresher ice of the upper surface which has not yet covered with as much dust as the lower surface.