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Originally posted by blackspirit
I think it would most likely be weather effects. Being a dusty surface and frequent to dust storms. One storm fades, the next picks up and carry's on, etc etc.
While the new MOC image shows that "Inca City" has a larger context as part of a circular form, it does not reveal the exact origin of these striking and unusual martian landforms.
Originally posted by unitedeufope
Updated now I found where to add images to page.
It looks to me like an overlay of the earth, please see image below I have made.