Tiu Valles

Viking Orbiter 1 image of part of Tiu Valles
Coordinates	15°54′N 35°42′W / 15.9°N 35.7°W / 15.9; -35.7

The Tiu Valles /ˈtiːuː ˈvæliːz/ are an outflow channel system in the Oxia Palus quadrangle of Mars, centered at 16.23° North and 34.86° West.^[1]

They are 1,720 km (1,070 mi) long and were named after the word for "Mars" in Old English (West Germanic).^[1]

• 
  Tographic map of Oxia Palus region of Mars showing the location of a number of chaos regions and valleys, including the Tiu Valles
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  Viking Orbiter 1 image of a distal (northern) part of Tiu Valles, showing where it divides to go around the craters Lydda and Kipini.
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  The Tiu Valles, as seen by HiRISE. Ridges were probably formed by running water (scale bar is 1.0 km)