[ElkGroveDan]

At least after carefully examining the picture, I can certify that it was not digitally manipulated.

I think the guy took one of the MER mars photos, desaturated the orange color, cranked up the blue and gray colors and dropped in water and clouds.

A good photoshopper can do this (or anything else) in a such a way that you could not "certify" whether or not it was manipulated. (As opposed to the cheesy cut and paste photos we often see.)

[rintense]

There are terrains all over the world that look like that. The US and New Zealand come to mind here.