{{Short description|Valley on Mars which appears to have been carved by water}}{{Infobox feature on celestial object |name = Reull Vallis |coordinates = {{coord|42.6|S|255.9|W|globe:mars_type:landmark|display=inline,title}} |length = 945.0 |naming = Word for "planet" in Gaelic }} '''Reull Vallis''' is a valley on [[Mars]] that appears to have been carved by water. It runs westward into [[Hellas Planitia]]. It is named after the [[Goidelic languages|Gaelic]] word for [[planet]]. It is found in the [[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 apron]]s, which have been proven to contain large amounts of ice. Reull Vallis, as pictured below, displays these deposits.<ref>http://themis.asu.edu.zoom-20070716a{{dead link|date=January 2018 |bot=InternetArchiveBot |fix-attempted=yes }}</ref><ref name = "Koebler2013">{{cite web | last = Koebler | first = J. | title = European Space Agency Discovers 'Striking' Ancient River on Mars | publisher = [[U.S. News & World Report]] | date = 2013-01-18 | url = https://www.usnews.com/news/articles/2013/01/18/european-space-agency-discovers-striking-ancient-river-on-mars | access-date = 2013-11-16}}</ref><ref name = "ESA2013-01">{{cite web | title = Reull Vallis:a river ran through it | website = ESA space science web site | publisher = [[European Space Agency]] | date = 2013-01-17 | url = http://www.esa.int/Our_Activities/Space_Science/Reull_Vallis_a_river_ran_through_it | access-date = 2013-11-16}}</ref>
== Gallery ==
<gallery widths="260px" heights="230px" > Image:Reull Vallis.JPG|Drainage features in Reull Vallis, as seen by [[Thermal Emission Imaging System|THEMIS]]. Click on image to see relationship of Reull Vallis to other features.
File:Reull Vallis lineated deposits.jpg|Reull Vallis with lineated floor deposits, as seen by [[Thermal Emission Imaging System|THEMIS]]. Click on image to see relationship to other features.
Image:Reull Vallisl layers.JPG|Layers in Reull Vallis, as seen by [[Thermal Emission Imaging System|THEMIS]].
Image:Fretted terrain near ReullVallis.jpg|[[Fretted terrain]] near Reull Vallis, as seen by [[HiRISE]].
Image:Close-up of Fretted Terrain near Reull Vallis.JPG|Close-up of [[fretted terrain]] near Reull Vallis, as seen by HiRISE. This area would be a challenge to walk across.
Image:Layers in Monument Valley.jpg|Layers in [[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.
</gallery>
==See also== *[[Dao Vallis]] *[[Harmakhis Vallis]]
== References == {{Reflist}}
==External links== {{Commons category|Reull Vallis}} * [http://www.google.com/mars/#lat=-42.000325&lon=101.997070&zoom=5&q=reull%20vallis Google Mars map centred on Reull Vallis]. *[https://pubs.usgs.gov/sim/3245/ Geologic Map of Reull Vallis Region of Mars], by Astrogeology Science Center, U.S. Geological Survey
{{Geography of Mars}} {{Portal bar|Solar System}} {{Authority control}}
[[Category:Valleys and canyons on Mars]] [[Category:Hellas quadrangle]]
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