Bahram Vallis is an ancient river valley in the Lunae Palus quadrangle

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 Astrogeology Research Program. The quadrangle is also referred to as MC-10 ....

 of Mars

Mars

Mars is the fourth planet from the Sun in the Solar System. The planet is named after the Roman god of war, Mars. It is often described as the "Red Planet", as the iron oxide prevalent on its surface gives it a reddish appearance...

 at 20.7° north latitude and 57.5° east longitude. It is about 302 km long and was named after the word for 'Mars' in Persian. Bahram Vallis is located midway between Vedra Vallis

Vedra Vallis

Vedra Vallis is an ancient river valley in the Lunae Palus quadrangle of Mars, located at 19.4° N and 55.6° W. It is 115.0 Km long and was named after an ancient river in Great Britain....

 and lower Kasei Valles

Kasei Valles

Kasei Valles is a giant system of canyons in Mare Acidalium and Lunae Palus quadrangles on Mars, located at 24.6° north latitude and 65.0° west longitude. It is 1,780 km long and was named for the word for "Mars" in Japanese. This huge system is 300 miles wide in some places. In contrast,...

. It is basically a single trunk valley, with scalloped walls in some places. The presence of streamlined erosional features on its floor shows that fluid was involved with its formation.