The Maumee Valles are a set of channels in an ancient river valley in the Lunae Palus quadrangle of Mars, located at 19.7° N and 53.2° W. They are 350 km (220 mi) long and were named after a North American river in Indiana and Ohio.

[1] Together with other ancient river valleys, they have provided strong evidence for a great deal of running water on the surface of Mars.

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