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[[Image:Thumbnail cliff.jpg|thumb|Thumbnail is the world's tallest [[sea cliff]] at over 1500 meters.]]
The '''Thumbnail''' is the sea cliff located in South [[Greenland]] in [[Cape Farewell, Greenland|Cape Farewell]] region, ca. 50 km to the east from the town of [[Nanortalik]], over the west side of [[Torssukátak]] Fjord (often known as [[Torssukátak]] Sound as it divides the main land from the [[Pamiagdluk Island]]). It is recognized as the world's tallest [[sea cliff]] at nearly 1500 meters. It belongs to the massif of [[Maujit Qaqarssuasia]] (also Qoqarssuasia), 1560 m a.s.l., being its eastern flank. The nearest peak dominating the neighbor ridges is [[Agdlerussakasit]] (1760 or 1706 m a.s.l.) and some of the reports on the climbs on the cliff also refer to this last name.
In 2000, 2003 and 2007 there were established 4 climbing routes on the east face, all starting from the sea. The hardest one is the earliest, British route, established in the steepest, right-hand part of the face in 2000 and [[Grade (climbing)|graded]] as English E6, 6b or American 5.12c. The route finishes on the subsidiary top/outcrop (which was in 2000 called as Thumbnail itself) and has altitude approximated by altimeter as 1350 meters a.s.l. (originally 4490 ft, see references, AAJ 2001, pp. 64 and 70).
*[http://c498469.r69.cf2.rackcdn.com/2001/57_parnell_learning_aaj2001.pdf Ian Parnell: ''Learning Process''. American Alpine Journal 2001, pp. 57-70, internet version as pdf file] (Retrieved 2011-11-14).