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Simud Valles is an ancient outflow channel in the Oxia Palus quadrangle of Mars, located at 19.8° N and 37.8° W. It is 945.0 km long and was named for the word for "Mars" in Sumerian. Note: Descriptor term changed to the plural (valles), and coordinates redefined 3/31/2008.
References
Simud Valles Wikipedia(Text) CC BY-SA