Ladon Valles

{{Short description|River valley system on Mars}} {{Infobox feature on celestial object |name = Ladon Valles |image = [[File:Ladon Valles.JPG|250px]] |caption = The Ladon Valles as seen by [[HiRISE]]. |coordinates = {{coord|22.6|S|28.7|W|globe:mars_type:landmark|display=inline,title}} |dimensions = 278 km long }}

The '''Ladon Valles''' are a river valley system lying within the [[Margaritifer Sinus quadrangle]] (MC-19) region of the planet [[Mars]] located at 22.6° South and 28.7° West. They are 278 km long and were named after an ancient name for a [[Greece|Greek]] river.<ref>{{gpn|3224}}</ref>

It has been argued that [[Uzboi Vallis|Uzboi]], Ladon, Margaritifer and [[Ares Vallis|Ares]] valles, although now separated by large craters, once comprised a single [[outflow channel]] system flowing north into [[Chryse Planitia]].<ref>Parker, T.J., Clifford, S.m., and Banerdt, W.B. (2000). Argyre Planitia and the Mars global hydrologic cycle. LPSC XXXI, Abstract 2033.</ref> The source of this outflow has been suggested as overflow from the [[Argyre Planitia|Argyre]] crater, formerly filled to the brim as a [[lake]] by channels (Surius, Dzigai, and Palacopus valles) draining down from the south pole. If real, the full length of this drainage system would be over 8000 km, the longest known drainage path in the [[Solar System]].

Mapjones.jpg|Map showing locations of the Ladon Valles and other nearby valleys </gallery>

==See also==

* [[Geology of Mars]] * [[HiRISE]] * [[Lakes on Mars]] * [[Outflow channels]] * [[Uzboi-Landon-Morava (ULM)]] * [[Vallis (planetary geology)]] * [[Water on Mars]]

== References == {{reflist}}

==External links== * [https://www.flickr.com/photos/136797589@N04/33060101483/ High resolution] [https://www.flickr.com/photos/136797589@N04/33824212966/ videos] by Seán Doran of overflights of parts of Ladon Valles

[[Category:Margaritifer Sinus quadrangle]] [[Category:Valleys and canyons on Mars]]