Tyras Vallis is an ancient river valley in the

Lunae Palus quadrangle The Lunae Palus quadrangle is one of a series of 30 quadrangle maps of Mars used by the United States Geological Survey (USGS) Astrogeology Research Program. The quadrangle is also referred to as MC-10 (Mars Chart-10). Lunae Planum and parts of ...

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 The Dniester, ; rus, Дне́стр, links=1, Dnéstr, ˈdⁿʲestr; ro, Nistru; grc, Τύρᾱς, Tyrās, ; la, Tyrās, la, Danaster, label=none, ) ( ,) is a transboundary river in Eastern Europe. It runs first through Ukraine and th ...

(in

Ukraine Ukraine ( uk, Україна, Ukraïna, ) is a country in Eastern Europe. It is the second-largest European country after Russia, which it borders to the east and northeast. Ukraine covers approximately . Prior to the ongoing Russian inv ...

). Image:Tyras Vallis Fan Deposit.JPG, Tyras Vallis Fan Deposit, as seen by HiRISE. Click on image to see layers. Image:Tyrasvallis2.JPG, Tyras Vallis Fan Deposit at a different sun angle. The scale bar is 500 meters long. This image is just to the right of the previous image. Image:Layers in Monument Valley.jpg, Layers in Monument Valley. These are accepted as being formed, at least in part, by water deposition. Since Mars contains similar layers, water remains as a major cause of layering on Mars.

References

Lunae Palus quadrangle Valleys and canyons on Mars {{Mars-stub