Map showing Nanedi Valles in context

Nanedi Valles lies at approximately 6.0° North and 312° East in the region of Xanthe Terra, southwest of Chryse Planitia and north of the Orson Welles and Da Vinci crater features. It is roughly 800 kilometre long. While scientific debate continues, it seems likely that some sort of continuous flow rather than a single flooding event helped create the valley.