{{Short description|Canyon on Mars}} {{Infobox feature on celestial object |name = Chasma Boreale |image = [[File:Chasma Boreale Channels.jpg|200px]] |caption = Chasma Boreale Channels, as seen by [[HiRISE]]. |coordinates = {{coord|83|N|47.1|W|globe:mars_type:landmark|display=inline,title}} }} [[File:Marslayers hirise big.jpg|thumb|Red Cliffs of Mars, at the Chasma Boreale. 2008 photo by [[HiRISE]].]]

'''Chasma Boreale''' is a large canyon in Mars's [[Martian polar ice caps|north polar ice cap]] in the [[Mare Boreum quadrangle]] of Mars at 83° north latitude and 47.1° west longitude. It is about {{Convert|560|km|abbr=on}} long and was named after a classical albedo feature name.<ref>[http://planetarynames.wr.usgs.gov Gazetteer of Planetary Nomenclature]</ref> The canyon's sides reveal layered features within the ice cap that result from seasonal melting and deposition of ice, together with dust deposits from [[Martian dust storm]]s. Information about the past climate of Mars may eventually be revealed in these layers, just as tree ring patterns and ice core data do on Earth. Both polar caps also display grooved features, probably caused by wind flow patterns. The grooves are also influenced by the amount of dust.<ref>{{Cite web |url=http://www.windows.ucar.edu/tour/link%3D/mars/places/mars_polar_regions.html%26edu%3Dhigh |title=Mars Polar Regions |access-date=2019-06-28 |archive-url=https://web.archive.org/web/20090831082004/http://www.windows.ucar.edu/tour/link%3D/mars/places/mars_polar_regions.html%26edu%3Dhigh |archive-date=2009-08-31 |url-status=dead }}</ref> The more dust, the darker the surface. The darker the surface, the more melting as dark surfaces absorb more energy.

==Gallery== <gallery widths="220px" heights="220px" > Chasma Boreale Streamined Feature.JPG|Chasma Boreale streamined feature, as seen by [[HiRISE]]. Chasma Boreale.jpg|Chasma Boreale, as seen by [[HiRISE]]. Chasma Boreale, Mars.jpg|<small>Computer-generated view based on images of Chasma Boreale captured by the [[Thermal Emission Imaging System|THEMIS]] instrument on [[2001 Mars Odyssey|Mars Odyssey]].</small> </gallery>

==References== {{Reflist}}

==External links== *{{Commons category-inline}}

{{Geography of Mars}} {{Portal bar|Solar System}}

[[Category:Mare Boreum quadrangle]] [[Category:Valleys and canyons on Mars]]

{{Mars-stub}}