...the bottom of a glacier is filled with rock debris produced by the erosion and abrasion of the glacier, which is then sandwiched between the glacier and the glacial bed. This is called a ground moraine. In the case of a valley glacier, the moraine that is carried along the side wall is called a lateral moraine, and when two glaciers join together, one of the lateral moraines is carried in the center of the joined glaciers and is called a median moraine. The central and lateral moraines are also called surface moraines because they are carried on the surface of the glacier. *Some of the terminology explanations that mention "medial moraine" are listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…氷河底には氷河のもぎ取り,削磨の作用によって生産された岩屑が挟まれて運搬され,あるいは堆積しているが,これをグランド・モレーンground moraine(底モレーン,底堆石)という。谷氷河の場合に側壁に沿って運ばれるのを側方モレーンlateral moraine(側堆石)と呼び,氷河が合流して側方モレーンの一方が合流した氷河の中央に位置しつつ運ばれるのを中央モレーンmedial moraine(中堆石)という。中央モレーンと側方モレーンは,氷河の表面に乗って運ばれるので表面モレーン(表堆石)ともいう。… ※「medial moraine」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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