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roche moutonnée

[rohsh moot-n-ey; French rawsh moo-taw-ney] /ˈroʊʃ ˌmut nˈeɪ; French rɔʃ mu tɔˈneɪ/
noun, Geology
1.
a rounded, glacially eroded rock outcrop, usually one of a group, resembling a sheep's back.
Also called sheepback rock.
Origin
1835-1845
1835-45; < French: glaciated rock, literally, fleecy rock
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for roche moutonnee

roche moutonnée

/ˈrəʊʃ ˌmuːtəˈneɪ/
noun (pl) roches moutonnées (ˈrəʊʃ ˌmuːtəˈneɪz)
1.
a rounded mass of rock smoothed and striated by ice that has flowed over it
Word Origin
C19: French, literally: fleecy rock, from mouton sheep
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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roche moutonnee in Science
roche moutonnée
  (rôsh' mt'n-ā', m'tô-nā')   
An elongate mound of bedrock worn smooth and rounded by glacial abrasion. A roche moutonnée has a long axis parallel to the direction of glacial movement, a gently sloping, striated side facing the direction from which the glacier originated, and a steeper side facing the direction of glacial movement. The height, length, and width of roche moutonnées are on the order of a few meters (tens of feet).
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Encyclopedia Article for roche moutonnee

glaciated bedrock surface, usually in the form of rounded knobs. The upstream side of a roche moutonnee has been subjected to glacial scouring that has produced a gentle, polished, and striated slope; the downstream side has been subjected to glacial plucking that has resulted in a steep, irregular, and jagged slope. The ridges dividing the upstream and downstream slopes are therefore perpendicular to the general flow direction of the former ice mass

Learn more about roche moutonnee with a free trial on Britannica.com
Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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