# Reull Vallis

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Valley on Mars which appears to have been carved by water

Reull Vallis Coordinates 42°36′S 255°54′W / 42.6°S 255.9°W / -42.6; -255.9 Length 945.0 Naming Word for "planet" in Gaelic

**Reull Vallis** is a valley on [Mars](/source/Mars) that appears to have been carved by water. It runs westward into [Hellas Planitia](/source/Hellas_Planitia). It is named after the [Gaelic](/source/Goidelic_languages) word for [planet](/source/Planet). It is found in the [Hellas quadrangle](/source/Hellas_quadrangle).

## Lineated Floor Deposits

On the floors of some channels are features called lineated floor deposits. They are ridged and grooved materials that seem to deflect around obstacles. They are believed to be ice-rich. Some glaciers on the Earth show such features. Lineated floor deposits may be related to [lobate debris aprons](/source/Lobate_debris_apron), which have been proven to contain large amounts of ice. Reull Vallis, as pictured below, displays these deposits.[1][2][3]

## Gallery

		- Drainage features in Reull Vallis, as seen by [THEMIS](/source/Thermal_Emission_Imaging_System). Click on image to see relationship of Reull Vallis to other features.

		- Reull Vallis with lineated floor deposits, as seen by [THEMIS](/source/Thermal_Emission_Imaging_System). Click on image to see relationship to other features.

		- Layers in Reull Vallis, as seen by [THEMIS](/source/Thermal_Emission_Imaging_System).

		- [Fretted terrain](/source/Fretted_terrain) near Reull Vallis, as seen by [HiRISE](/source/HiRISE).

		- Close-up of [fretted terrain](/source/Fretted_terrain) near Reull Vallis, as seen by HiRISE. This area would be a challenge to walk across.

		- Layers in [Monument Valley](/source/Monument_Valley), Utah. 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.

## See also

- [Dao Vallis](/source/Dao_Vallis)

- [Harmakhis Vallis](/source/Harmakhis_Vallis)

## References

1. **[^](#cite_ref-1)** [http://themis.asu.edu.zoom-20070716a](http://themis.asu.edu.zoom-20070716a)[*[permanent dead link](https://en.wikipedia.org/wiki/Wikipedia:Link_rot)*]

1. **[^](#cite_ref-Koebler2013_2-0)** Koebler, J. (2013-01-18). ["European Space Agency Discovers 'Striking' Ancient River on Mars"](https://www.usnews.com/news/articles/2013/01/18/european-space-agency-discovers-striking-ancient-river-on-mars). [U.S. News & World Report](/source/U.S._News_%26_World_Report). Retrieved 2013-11-16.

1. **[^](#cite_ref-ESA2013-01_3-0)** ["Reull Vallis:a river ran through it"](http://www.esa.int/Our_Activities/Space_Science/Reull_Vallis_a_river_ran_through_it). *ESA space science web site*. [European Space Agency](/source/European_Space_Agency). 2013-01-17. Retrieved 2013-11-16.

## External links

Wikimedia Commons has media related to [Reull Vallis](https://commons.wikimedia.org/wiki/Category:Reull_Vallis).

- [Google Mars map centred on Reull Vallis](http://www.google.com/mars/#lat=-42.000325&lon=101.997070&zoom=5&q=reull%20vallis).

- [Geologic Map of Reull Vallis Region of Mars](https://pubs.usgs.gov/sim/3245/), by Astrogeology Science Center, U.S. Geological Survey

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Adapted from the Wikipedia article [Reull Vallis](https://en.wikipedia.org/wiki/Reull_Vallis) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/Reull_Vallis?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.