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Tyras Vallis is an ancient river valley in the Lunae Palus quadrangle of Mars. It is located at 8.4 N° and 50.2° W. It was named after a classical name for the present Dniester River (in Ukraine). [1]

References

  1. ^ "Planetary Names: Vallis, valles: Tyras Vallis on Mars". planetarynames.wr.usgs.gov. Retrieved 2021-09-26.