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119:. The bottom of the canyon is below sea level; the canyon is likely to have influenced basal water flow from the ice sheet interior to the margin. Jonathan Bamber, a geographer at University of Bristol, stated, "The distinctive V-shaped walls and flat bottom suggests water carved the buried valley, not ice."
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The canyon is more than 750 kilometres (466 mi) long, up to 800 metres (2,600 ft) deep and 10 kilometres (6 mi) wide, making it the longest canyon discovered on the Earth to date. There are, however, many canyons—including
Arizona's
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Jonathan L. Bamber, Martin J. Siegert, Jennifer A. Griggs, Shawn J. Marshall, and
Giorgio Spada, "Paleofluvial Mega-Canyon Beneath the Central Greenland Ice Sheet",
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The canyon predates ice sheet inception and has influenced basal hydrology in
Greenland over past glacial cycles.
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showed a huge subglacial canyon running from the central region of the island northward into the
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173:"Scientists Discover a Mega-Canyon Beneath the Melting Ice Sheets of Greenland"
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289:"Canyon longer than Grand Canyon found buried under Greenland ice sheet"
131:(overall 2,268 meters), previously the world's longest—that are deeper.
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on 30 August 2013 (submitted 29 April 2013), by scientists from the
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224:'Grand Canyon of Greenland' discovered under ice sheet
203:, 30 August 2013, Vol. 341 no. 6149, pp. 997-999.
241:"Grand Canyon of Greenland Discovered under Ice"
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51:Topographic map of the bedrock under the ice
67:of record length discovered underneath the
263:"Greenland's Mega Canyon (narrated video)"
151:"Beneath Greenland's ice, a grand canyon"
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93:, who described it as a mega-canyon.
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27:Large subglacial canyon in Greenland
364:Canyons and gorges of North America
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226:", NBC News, August 29, 2013
129:Yarlung Tsangpo Grand Canyon
127:(1,857 meters) and Tibet's
71:as reported in the journal
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209:10.1126/science.1239794
43:Animation of the canyon
369:Landforms of Greenland
99:data collected during
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97:Ice-penetrating radar
87:University of Calgary
79:University of Bristol
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243:. News.discovery.com
91:University of Urbino
330:79.0000°N 46.0000°W
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294:The Daily Telegraph
105:Operation IceBridge
69:Greenland ice sheet
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354:2013 in Greenland
335:79.0000; -46.0000
117:Petermann Glacier
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299:. Retrieved
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125:Grand Canyon
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109:Arctic Ocean
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57:Grand Canyon
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247:2 September
348:Categories
321:46°00′00″W
318:79°00′00″N
138:References
301:30 August
273:30 August
185:30 August
157:30 August
111:, to the
61:Greenland
201:Science
115:of the
81:led by
74:Science
89:, and
65:canyon
153:. CNN
113:fjord
303:2013
275:2013
267:NASA
249:2013
187:2013
178:Time
159:2013
101:NASA
55:The
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