Erratic block, erratic block
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A mass of rock that has been separated from its parent rock and transported to its present location by the movement of a glacier. In the early 19th century, the origin and transport of large rock masses over great distances in the Alps became a major issue [de Saussure: 1786, Gruner: 1806, De la Beche: 1831, Charpentier: 1835]. Playfair was apparently the first to describe glacial transport [Playfair: 1802, Charlesworth: 1957, Flint: 1971]. Source: Asakura Publishing Dictionary of Petrology Information |
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母岩から離れて氷河の移動によって現在の地点まで輸送された岩石の塊．19世紀初めに，アルプスで大きな岩塊が非常に離れた場所に輸送された起源や輸送作用などが大きな問題となった［de Saussure : 1786, Gruner : 1806, De la Beche : 1831, Charpentier : 1835］．氷河による移動を記したのはプレイフェアが最初らしい［Playfair : 1802, Charlesworth : 1957, Flint : 1971］． 出典 朝倉書店岩石学辞典について 情報 |
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