Still the form of drawing of a protector can depend on a superficial tension of soil. It is the characteristic it can be various in different territories. We don't know much about local Martian conditions
but look at the edges on your and mine picture.On my picture it looks like some kind of mosaic with sharp edge.I will post picture where rover make track on similar terain
You wrote in thetopic line: Collumbia hills- Gusev - Mars So, I'm assuming that the pictures are made by the Spirit Rover.
It would be useful to know the "Sol" time, when these pictures were taken. If you are unsure, then everything else you know. Otherwise, the information would be useless! Write downalwaysthe source address,ifyou there isno otherinformation. Mabye we can figure out the rest.
Good luck.
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Time is the best teacher, but unfortunately, it kills all of its students.