翻訳と辞書 Words near each other ・ Degodehaus ・ Degodi lark ・ DeGoes Cliff ・ Degognia Creek ・ Degognia Township, Jackson County, Illinois ・ DeGol Arena ・ DeGol Field ・ Degole parish ・ Degollado ・ DeGolyer and MacNaughton ・ Degonia Formation ・ Degory Priest ・ Degory Wheare ・ Degos disease ・ Degradation ・ Degradation (geology) ・ Degradation (telecommunications) ・ Degradation of the Mayan archeological sites ・ Degradation Trip ・ Degradation Trip Volumes 1 & 2 ・ Degradative enzyme ・ Degraded mode ・ Degradome sequencing ・ Degradosome ・ DeGraff Building ・ DeGraffenreidt-Johnson House ・ DeGraffenried Park Historic District ・ Degranulation ・ Degranvillea ・ Degrassi Dictionary Lists mini英和辞書 mini和英辞書 Webster 1913 Latin-English FOLDOC Wikipedia English ウィキペディア

翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Degradation (geology) ： ウィキペディア英語版 Degradation (geology) In geology, degradation refers to the lowering of a fluvial surface, such as a stream bed or floodplain, through erosional processes.〔(【引用サイトリンク】title=Estuarine & Floodplain degradation ) 〕 It is the opposite of aggradation. Degradation is characteristic of channel networks in which either bedrock erosion is taking place, or in systems that are sediment-starved and are therefore entraining more material than is being deposited. When a stream degrades, it leaves behind a fluvial terrace. This can be further classified as a strath terrace—a bedrock terrace that may have a thin mantle of alluvium—if the river is incising through bedrock. These terraces may often be dated with methods such as cosmogenic radionuclide dating, OSL dating, and paleomagnetic dating (using reversals in the Earth's magnetic field to constrain the timing of events) to find when a river was at a particular level and how quickly it is downcutting. == References == 〔 * * 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「Degradation (geology)」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.