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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Rock cycle ： ウィキペディア英語版 Rock cycle The rock cycle is a basic concept in geology that describes the dynamic transitions through geologic time among the three main rock types: sedimentary, metamorphic, and igneous. As the diagram to the right illustrates, each of the types of rocks is altered or destroyed when it is forced out of its equilibrium conditions. An igneous rock such as basalt may break down and dissolve when exposed to the atmosphere, or melt as it is subducted under a continent. Due to the driving forces of the rock cycle, plate tectonics and the water cycle, rocks do not remain in equilibrium and are forced to change as they encounter new environments. The rock cycle is an illustration that explains how the three rock types are related to each other, and how processes change from one type to another over time. ==Historical development== The original concept of the ''rock cycle'' is usually attributed to James Hutton, from the eighteenth century ''Father of Geology''. The rock cycle was a part of Hutton's uniformitarianism and his famous quote: ''no vestige of a beginning, and no prospect of an end'', applied in particular to the rock cycle and the envisioned cyclical nature of geologic processes. This concept of a repetitive non-evolutionary rock cycle remained dominant until the plate tectonics revolution of the 1960s. With the developing understanding of the driving ''engine'' of plate tectonics, the rock cycle changed from endlessly repetitive to a gradually evolving process. The ''Wilson cycle'' (a plate tectonics based rock cycle) was developed by J. Tuzo Wilson during the 1950s and 1960s. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Rock cycle」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.