翻訳と辞書 Words near each other ・ River Wharfe ・ River Wheelock ・ River Whitewater ・ River Windrush ・ River Winster ・ River Winterborne ・ River Wiske ・ River Wissey ・ River Witham ・ River Witham sword ・ River Without Buoys ・ River Wolf ・ River Wolf (disambiguation) ・ River Worfe ・ River Terrace, Washington, D.C. ・ River terraces (tectonic–climatic interaction) ・ River terrapin ・ River Terrig ・ River Tescou ・ River Test ・ River Teviot ・ River Thame ・ River Thames ・ River Thames frost fairs ・ River Thames whale ・ River Thaw ・ River Thet ・ River Thrushel ・ River Thurne ・ River Thurso 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 River terraces (tectonic–climatic interaction) ： ウィキペディア英語版 River terraces (tectonic–climatic interaction) Terraces can be formed in many ways and in several geologic and environmental settings. By studying the size, shape, and age of terraces, one can determine the geologic processes that formed them. When terraces have the same age and/or shape over a region, it is often indicative that a large-scale geologic or environmental mechanism is responsible. Tectonic uplift and climate change are viewed as dominant mechanisms that can shape the earth’s surface through erosion. River terraces can be influenced by one or both of these forcing mechanisms and therefore can be used to study variation in tectonics, climate, and erosion, and how these processes interact. ==River terrace formation== Long-lived river (fluvial) systems can produce a series of terrace surfaces over the course of their geologic lifetime. When rivers flood, sediment deposits in sheets across the floodplain and build up over time. Later, during a time of river erosion, this sediment is cut into, or incised, by the river and flushed downstream. The previous floodplain is therefore abandoned and becomes a river terrace. A river terrace is composed of an abandoned surface, or tread, and the incised surface, or riser.〔Easterbrook, D.J., 1999, Surface Professes and Landforms: New York, New York, Prentice Hall, 546 p.〕 If you can date the age of the terrace tread, one can get an estimate of the age of abandonment of that surface, and the age of incision. A simple calculation of h1/t1 can give the average rate of incision(ri), where hi = height of river terrace from river and ti = age of surface.〔Blum, M.D., and Tornqvist, T. E., 2000, Fluvial responses to climate and sea-level change: a review and look forward: Sedimentology, 47, p. 2-48.〕 It is important to note that these rates of incision assume a constant rate of incision over the entire height and time. 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「River terraces (tectonic–climatic interaction)」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.