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Nunatak

January 01, 1970

For other uses, see Nunatak (disambiguation).

A nunatak (from Inuit nunataq) is the summit or ridge of a mountain that protrudes from an ice field or glacier that otherwise covers most of the mountain or ridge. They often form natural pyramidal peaks. Isolated nunataks are also called glacial islands,[2] and smaller nunataks rounded by glacial action may be referred to as rognons.[3][4]

Starr Nunatak, on the coast of Victoria Land, Antarctica
Cântaro Magro, Serra da Estrela, Portugal, formed as a nunatak during the last ice age and now exposed.[1]

The word is of Greenlandic origin[5] and has been used in English since the 1870s.

Description edit

The term nunatak is typically used in areas where a permanent ice sheet is present and the ridge protrudes above the sheet.[6] Nunataks present readily identifiable landmark reference points in glaciers or ice caps and are often named. While some are isolated, they can also form dense clusters, such as Queen Louise Land in Greenland.[7]

Nunataks are generally angular and jagged, hampering the formation of glacial ice on their tops, although snow can accumulate on them. This can contrast strongly with the softer contours of the glacially eroded land after a glacier retreats. They are not greatly affected by frost weathering, given the low frequency of freeze-thaw cycles in areas of ice caps and ice sheets.[8][page needed]

Typically nunataks are the only places where plant life can survive on ice sheets or ice caps. Lifeforms on nunataks are often isolated by the surrounding ice or glacier, providing unique habitats.[9]

List edit

Main article: List of nunataks

See also edit

  • Fell – High and barren landscape feature
  • Glacial landform – Landform created by the action of glaciers

References edit

  1. ^ Vieira, G.T.; Ferreira, A.B. (1998). "General characteristics of the glacial geomorphology of the Serra da Estrela" (PDF). In G.T. Vieira (ed.). Glacial and Periglacial Geomorphology of the Serra da Estrela. Guidebook for the field-trip IGU Commission on Climate Change and Periglacial Environments, 26–28 August 1998. pp. 37–48. Retrieved October 16, 2011.
  2. ^ Physical Geography: Hydrosphere, 2006, ISBN 8183561675, p. 114
  3. ^ Neuendorf, Klaus K. E.; Institute, American Geological (2005). Glossary of Geology. Springer Science & Business Media. ISBN 9780922152766.
  4. ^ "Rognon definition and meaning | Collins English Dictionary". www.collinsdictionary.com. Retrieved 2019-02-06.
  5. ^ "Merriam-Webster: nunatak". Retrieved October 16, 2011.
  6. ^ J. J. Zeeberg, Climate and Glacial History of the Novaya Zemlya Archipelago, Russian Arctic. pp. 82–84
  7. ^ "Dronning Louise Land". Mapcarta. Retrieved 2 July 2016.
  8. ^ Tricart, Jean; Cailleux, André (1968). Introduction à la Géomorphologie Climatique (in French).
  9. ^ ice cap – National Geographic Society

External links edit

  •   Media related to Nunataks at Wikimedia Commons
  • Nunatak survival of the high Alpine plant Eritrichium nanum

January 01, 1970
nunatak, other, uses, disambiguation, nunatak, from, inuit, nunataq, summit, ridge, mountain, that, protrudes, from, field, glacier, that, otherwise, covers, most, mountain, ridge, they, often, form, natural, pyramidal, peaks, isolated, nunataks, also, called,. For other uses see Nunatak disambiguation A nunatak from Inuit nunataq is the summit or ridge of a mountain that protrudes from an ice field or glacier that otherwise covers most of the mountain or ridge They often form natural pyramidal peaks Isolated nunataks are also called glacial islands 2 and smaller nunataks rounded by glacial action may be referred to as rognons 3 4 Starr Nunatak on the coast of Victoria Land Antarctica Cantaro Magro Serra da Estrela Portugal formed as a nunatak during the last ice age and now exposed 1 The word is of Greenlandic origin 5 and has been used in English since the 1870s Contents 1 Description 2 List 3 See also 4 References 5 External linksDescription editThe term nunatak is typically used in areas where a permanent ice sheet is present and the ridge protrudes above the sheet 6 Nunataks present readily identifiable landmark reference points in glaciers or ice caps and are often named While some are isolated they can also form dense clusters such as Queen Louise Land in Greenland 7 Nunataks are generally angular and jagged hampering the formation of glacial ice on their tops although snow can accumulate on them This can contrast strongly with the softer contours of the glacially eroded land after a glacier retreats They are not greatly affected by frost weathering given the low frequency of freeze thaw cycles in areas of ice caps and ice sheets 8 page needed Typically nunataks are the only places where plant life can survive on ice sheets or ice caps Lifeforms on nunataks are often isolated by the surrounding ice or glacier providing unique habitats 9 List editMain article List of nunataks Aitken Nunatak Akerlundh Nunatak Allan Hills aka Allan Nunatak All Blacks Nunataks Altsek Nunatak Anderson Nunataks Anoritooq Appalachia Nunataks Arena Corner Arkhangel skiy Nunataks Arrowhead Nunatak Atanasoff Nunatak Aviator Nunatak Belknap Nunatak Berg Mountains Bering Nunatak Bon Docteur Nunatak Bradley Nunatak Branson Nunatak Brusilov Nunataks Butcher Nunatak Cabrera Nunatak Calfee Nunatak Cameron Nunataks Canisp formed as a Nunatak Carapace Nunatak Cassandra Nunatak Castillo Nunatak Castor Nunatak Cat Nunatak Catenary Nunatak Cathedral Peak C H Ostenfeld Nunatak Chain Nunataks Cheeks Nunatak Chocolate Nunatak Clem Nunatak Cone Nunatak Copper Nunataks Cowie Nunatak Crash Nunatak Crosby Nunataks Daniels Hill Dean Nunataks Dee Nunatak Director Nunatak Dodd Nunatak Dome Nunatak Dotten Nunatak Dow Nunatak Downs Nunatak Drury Nunatak Du Toit Nunataks Dziura Nunatak Eaton Nunatak Eckins Nunatak Else Nunataks Erehwon Nunatak Erven Nunataks Esther Nunatak Everett Nunatak Exile Nunatak Exiles Nunataks Fallone Nunataks Faraway How Farquharson Nunatak Ferguson Nunataks Fiebelman Nunatak Filson Nunatak Fin Nunatak Florence Nunatak Foltz Nunatak Fomalhaut Nunatak Footscrew Nunatak Fraser Nunatak Friedmann Nunataks Galkin Nunatak Gallen Nunatak Gardner Nunatak Gillett Nunataks George Nunatak Gomez Nunatak Goodwin Nunataks Gootee Nunatak Gora Severny Nunatak Gordon Nunataks Gould Nunataks Gratton Nunatak Grayson Nunatak Gromov Nunataks Gronau Nunataks Grossman Nunataks Guardian Nunatak Haigh Nunatak Half Century Nunatak Half Dome Nunatak Halfway Nunatak Hamner Nunatak Harter Nunatak Harvey Nunataks Haupt Nunatak Henry Nunataks Herrmann Nunatak Heuser Nunatak Heverley Nunataks Holt Nunatak Hopalong Nunatak Horne Nunataks House Nunatak Hutchins Nunataks Jaques Nunatak Jane Peak Jarina Nunatak John Nunatak Johnson Nunataks Jorgensen Nunataks Jutulsessen Kalafut Nunatak Kamenev Nunatak Kenfield Nunatak Kinter Nunatak Kjuklingen Nunatak Klawatti Peak Klinck Nunatak Knight Nunatak Koehler Nunatak Komatsu Nunatak Kozlov Nunataks Krasin Nunataks Krasnaya Nunatak Krigsvold Nunataks Kyle Nunataks Lacroix Nunatak Lands End Nunataks Lang Nunatak Laputa Nunataks Last Cache Nunatak Lawson Nunatak Lawson Nunataks Leach Nunatak Lee Nunatak Lepley Nunatak Lewisohn Nunatak Lilliput Nunataks Lodalskapa Lonely One Nunatak Lonewolf 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Nunataks Salient Nunatak Sanders Nunatak Savin Nunatak Sawyer Nunatak Scheimpflug Nunatak Schloredt Nunatak Schoofs Nunatak Seacatch Nunataks See Nunatak Sevier Nunatak Shelton Nunataks Ship Nunatak Shoemake Nunatak Singleton Nunatak Slusher Nunatak Smahausane Nunataks Smorstabben Nunatak Solitary Nunatak Sonntag Nunatak Spectator Nunatak Stac Pollaidh formed as a Nunatak Stanford Nunatak Starr Nunatak Static Nunatak Stewart Hills Stinear Nunataks Striated Nunatak Suilven formed as a Nunatak Svarthamaren Mountain Swarsen Nunatak Swartz Nunataks Symes Nunatak Syningen Nunatak Table Nunatak Taurus Nunataks Teltet Nunatak Temnikow Nunataks Tern Nunatak Tester Nunatak Themis Nunatak Threshold Nunatak Tomandl Nunatak Tommeliten Rock Tomovick Nunatak Toth Nunataks Trillingane Nunataks Trioen Nunataks Trubyatchinskiy Nunatak Tuning Nunatak Turret Nunatak Tuttulikassak Twin Nunataks Utsteinen Nunatak Varney Nunatak Velchev Rock Vesleskarvet Velie Nunatak Vesthaugen Nunatak Vorta Nunatak Vulcan Nunatak Walker Nunatak Wallis Nunataks Walsh Nunatak Wandel Land Ward Nunataks Watkins Range Weather Guesser Nunataks Weikman Nunataks Whichaway Nunataks Whistler Nunatak White Nunataks Wilds Nunatak Willan Nunatak Williams Nunatak Willows Nunatak Windscoop Nunataks Witte Nunataks Wold Nunatak Wyers Nunataks Yingling Nunatak Young Nunataks Zohn NunataksSee also editFell High and barren landscape feature Glacial landform Landform created by the action of glaciersReferences edit Vieira G T Ferreira A B 1998 General characteristics of the glacial geomorphology of the Serra da Estrela PDF In G T Vieira ed Glacial and Periglacial Geomorphology of the Serra da Estrela Guidebook for the field trip IGU Commission on Climate Change and Periglacial Environments 26 28 August 1998 pp 37 48 Retrieved October 16 2011 Physical Geography Hydrosphere 2006 ISBN 8183561675 p 114 Neuendorf Klaus K E Institute American Geological 2005 Glossary of Geology Springer Science amp Business Media ISBN 9780922152766 Rognon definition and meaning Collins English Dictionary www collinsdictionary com Retrieved 2019 02 06 Merriam Webster nunatak Retrieved October 16 2011 J J Zeeberg Climate and Glacial History of the Novaya Zemlya Archipelago Russian Arctic pp 82 84 Dronning Louise Land Mapcarta Retrieved 2 July 2016 Tricart Jean Cailleux Andre 1968 Introduction a la Geomorphologie Climatique in French ice cap National Geographic SocietyExternal links edit nbsp Media related to Nunataks at Wikimedia Commons Nunatak survival of the high Alpine plant Eritrichium nanum Retrieved from https en wikipedia org w index php title Nunatak amp oldid 1210505565, wikipedia, wiki, book, books, library,

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