Editing Noctis Labyrinthus (section)

{{Short description|Labyrinthus on Mars}}
{{Infobox feature on celestial object
|name        = Noctis Labyrinthus
|image       = Noctis Labyrinthus Viking 1 1980.png
|caption     = Noctis Labyrinthus, as seen by [[Viking 1]]. North is up. The western initiation of the [[Valles Marineris]] is visible at the right. The [[Tharsis Montes]] are just beyond the horizon.
|coordinates = {{coord|7.0|S|102.2|W|globe:mars_type:landmark|display=inline,title}}
|length      = 1,263.0 km
|type = Canyon system
|eponym = Latin – ''Labyrinth of Night''
}}
[[File:Noctis Labyrinthus THEMIS day IR v11.5 0.5.jpg|thumb|right|High resolution [[Thermal Emission Imaging System|THEMIS]] daytime infrared image mosaic of Noctis Labyrinthus and its surroundings. The area is crisscrossed by multiple sets of [[graben]] running in different directions. The shield volcano [[Pavonis Mons]] is at upper left.]]
[[Image:M09 mtvs4187 45.gif|thumb|right|[[Mariner 9]] view of the Noctis Labyrinthus "labyrinth" at the western end of Valles Marineris on Mars. Linear graben, grooves, and crater chains dominate this region, along with a number of flat-topped mesas. The image is roughly 400 km across, centered at 6 S, 105 W, at the edge of the Tharsis bulge. North is up. Image located in [[Phoenicis Lacus quadrangle]]]]

{{langnf|la|'''Noctis Labyrinthus'''|Labyrinth of the Night}} is a region of [[Mars]] located in the [[Phoenicis Lacus quadrangle]], between [[Valles Marineris]] and the [[Tharsis]] upland.<ref name = "USGS">{{cite web
 | title = Noctis Labyrinthus | work = [USGS planetary nomenclature page]
 | publisher = [[USGS]] | url = http://planetarynames.wr.usgs.gov/Feature/4324
 | access-date = 2013-10-17}}</ref> The region is notable for its maze-like system of deep, steep-walled valleys. The valleys and canyons of this region formed by faulting and many show classic features of [[graben]]s, with the upland plain surface preserved on the valley floor. In some places the valley floors are rougher, disturbed by [[landslide]]s, and there are places where the land appears to have sunk down into pit-like formations.<ref>{{cite web |url=http://cmex.ihmc.us/cmex/data/voviews/Canyons/Noctis.htm |title=Noctis Labyrinthus|access-date=2006-10-04 |url-status=dead |archive-url=https://web.archive.org/web/20061004155124/http://cmex.ihmc.us/CMEX/data/VOViews/Canyons/Noctis.htm |archive-date=2006-10-04 }}</ref> It is thought that this faulting was triggered by volcanic activity in the [[Tharsis]] region.<ref>[http://themis.asu.edu/feature/6 Mars Odyssey Mission THEMIS: Feature Image: Noctis Labyrinthus Landslides]</ref>  Research described in December 2009 found a variety of minerals, including clays, sulfates, and hydrated silicas, in some of the layers.<ref>{{cite web |url=https://www.sciencedaily.com/releases/2009/12//091216205910.htm |title=Trough deposits on Mars point to complex hydrologic past |publisher=Sciencedaily.com |date=2009-12-17 |access-date=2013-07-16 |url-status=dead |archive-url=https://web.archive.org/web/20131018010626/https://www.sciencedaily.com/releases/2009/12//091216205910.htm |archive-date=2013-10-18 }}</ref>