Kanjon







Grand Canyon


En kanjon (av engelska canyon, från spanska cañón ’ravin’, ’rör’[1]) är en djup dalgång mellan höga klippväggar som av ett vattendrag karvats ur fast berggrund. Detta skiljer den från ravinen, där vattnet fört bort löst material i bildandet av dalgången.


En kanjon bildas genom att strömmande vatten, allt ifrån en flod till en å, eroderar ned berggrunden och bildar en dal där vattenflödet sedan flyter. Nivåskillnaderna i en kanjon kan uppgå till hundratals meter.


Kanjoner är vanliga i västra Nordamerika, där berggrunden ofta består av sedimentära bergarter som är lätteroderade. I Sverige finns bland annat Abiskojåkkas kanjon, Evagraven (Evig- eller Evengraven) och Hällingsåfallets kanjon, Sveriges längsta kanjon.[2]



Kända kanjoner |



  • Grand Canyon

  • Bryce Canyon nationalpark

  • Palo Duro



Se även |


  • Sprickdal


Referenser |




  1. ^ kanjon i Nationalencyklopedins nätupplaga. Läst 11 oktober 2017.


  2. ^ ”Arkiverade kopian”. Arkiverad från originalet den 20 juni 2015. https://web.archive.org/web/20150620120601/http://www.lansstyrelsen.se/jamtland/Sv/djur-och-natur/skyddad-natur/naturreservat/stromsund/hallingsafallet/Pages/index.aspx. Läst 31 maj 2015. 



Externa länkar |



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