…the presence of polished or abraded surfaces (glacier striae) on the surface of bedrock or rocks is evidence of the existence of glaciation. In areas of localized negative pressure, such as downstream of a bedrock protrusion, rock masses are torn off downstream (plucking), creating a rugged topography. Small convex topography created by glaciers is called roche moutonnée (French: roche moutonnée).… *Some terminology explanations that mention "plucking" are listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…岩盤や岩石の表面に磨かれた面や擦り傷(氷河擦痕glacier striae)が残っていれば,氷河作用が存在したことの証拠とされる。基盤岩の突出部の下流側などのように局部的に生じた負圧部では,岩塊が下流側にもぎ取られ(プラッキングplucking),ごつごつした地形がつくられる。氷河によってつくられる小さな凸地形としては羊背岩roche moutonnée(フランス語。… ※「plucking」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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