…The cirque is a steep wall between the summit or ridgeline, and the flat bottom of the cirque is surrounded by a horseshoe-shaped wall. Its shape resembles an amphitheater (Latin circus), and it is called a cirque in English and French. The ridgeline where the cirques meet back-to-back forms a jagged, narrow knife ridge, which is called a grat or an arête. … *Some of the terminology that mentions "cirque" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…山頂あるいは稜線との間は急な圏谷壁となっており,この谷壁で馬蹄形に囲まれるようにして,比較的平らな圏谷底がみられる。形態が円形競技場(ラテン語circus)に似ており,英・仏語ではcirqueという。圏谷が背中合せとなる稜線はぎざぎざなやせ尾根(ナイフ・リッジ)となり,グラートGrat,アレートarêteなどと呼ばれる。… ※「cirque」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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