{{Short description|Vallis on Mars}} {{Infobox feature on celestial object |name = Harmakhis Vallis |image = [[Image:Dao Niger and Harmakhis Vallis PIA02810.jpg|250px]] |caption = Harmakhis Vallis is the rightmost channel pictured. The direction of water flow was toward the bottom of the image. |coordinates = {{coord|40.4|S|90.4|E|globe:mars_type:landmark|display=inline,title}} |naming = [[Ancient Egyptian]] word for "Mars" }}
'''Harmakhis Vallis''' is a valley near [[Hellas Planitia]], [[Mars]]. It has been identified as an [[outflow channel]], the site of catastrophic floods of water during Mars' past.
[[Martian Gullies|Gullies]] are also common on the wall of Harmakhis Vallis, as seen the image below. Some authors have suggested these structures indicate geologically recent flow of small quantities of water across the surface.<ref>Heldmann, J. and M. Mellon. Observations of Martian gullies and constraints on potential formation mechanisms. 2004. Icarus. 168: 285-304.</ref>
{{Gallery |Image:Harmakhis Vallis.jpg|Gullies in the wall of Harmakhis, as seen by HiRISE. }}
==See also== *[[Dao Vallis]] *[[Reull Vallis]]
==References==
{{Reflist}}
;Further reading *{{cite conference|url=http://www.lpi.usra.edu/meetings/lpsc2004/pdf/1825.pdf|title=Morphologic Development of Harmakhis Vallis, Mars|author=Bleamaster, L, Crown, D|conference=[[Lunar and Planetary Science Conference]]|date=2004}} *{{cite conference|bibcode=1992LPI....23.1107P|title=Geologic Mapping of Part of Harmakhis Vallis Region, Mars: Evidence of Multiple Drainage Events|author=Price, K|conference=[[Lunar and Planetary Science Conference]]|date=1992}} {{commons category|Harmakhis Vallis}}
==External links== *[http://hirise.lpl.arizona.edu/PSP_007226_1400 HiRISE image of Harmakhis Vallis wall] {{Geography of Mars}} {{Portal bar|Solar System}}
[[Category:Valleys and canyons on Mars]] [[Category:Hellas quadrangle]]
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