Bahram Vallis is an ancient river valley in the

Lunae Palus quadrangle The Lunae Palus quadrangle is one of a series of list of quadrangles on Mars, 30 quadrangle maps of Mars used by the United States Geological Survey (USGS) Astrogeology Research Program. The quadrangle (geography), quadrangle is also referred to ...

Mars Mars is the fourth planet from the Sun. It is also known as the "Red Planet", because of its orange-red appearance. Mars is a desert-like rocky planet with a tenuous carbon dioxide () atmosphere. At the average surface level the atmosph ...

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

Vedra Valles The Vedra Valles are a set of channels in an ancient river valley in the Lunae Palus quadrangle of Mars, located at 19.4° N and 55.6° W. They are 115 km long and were named after an ancient river in Great Britain. Together with other ancient ...

and lower

Kasei Valles The Kasei Valles are a giant system of canyons in Mare Acidalium and Lunae Palus quadrangles on Mars, centered at 24.6° north latitude and 65.0° west longitude. They are long and were named for the word for "Mars" in Japanese. This is one ...

. 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.Baker, V. 1982. The Channels of Mars. University of Texas Press. Austin Image:Kasei Valles topolabled.JPG, Area around Northern Kasei Valles, showing relationships among

, Bahram Vallis,

Maumee Valles The Maumee Valles are a set of channels in an ancient river valley in the Lunae Palus quadrangle of Mars, located at 19.7° N and 53.2° W. They are long and were named after a North American river in Indiana and Ohio. Together with other anci ...

, and

Maja Valles The Maja Valles are a large system of ancient outflow channels in the Lunae Palus quadrangle on Mars. About Their location is 12.6° north latitude and 58.3° west longitude. The name is a Nepali word for "Mars". The Maja Valles begin at Juv ...

. Map location is in

and includes parts of Lunae Planum and Chryse Planitia. Image:Bahram Vallis.JPG, Bahram Vallis, as seen by

HiRISE High Resolution Imaging Science Experiment is a camera on board the '' Mars Reconnaissance Orbiter'' which has been orbiting and studying Mars since 2006. The 65 kg (143 lb), US$40 million instrument was built under the direction ...

. Rotational landslides (slumps) are visible at the base of north wall. File:ESP 056904 2015valley.jpg, Close view of part of Bahram Vallis, as seen by HiRISE under HiWish program

References

See also