翻訳と辞書 Words near each other ・ River Alun, Pembrokeshire ・ River Alyn ・ River Amber ・ River Amman ・ River Ancholme ・ River and Harbors Act of 1914 ・ River and Harbors Act of 1915 ・ River and Harbors Act of 1916 ・ River and Rowing Museum ・ River Angas ・ River Anker ・ River Annalee ・ River Annan ・ River Annas ・ River Ant ・ River anticlines ・ River Anton ・ River Ara ・ River Ardle ・ River Arrow ・ River Arrow Nature Reserve ・ River Arrow, Wales ・ River Arrow, Worcestershire ・ River Arth ・ River Artro ・ River Arun ・ River Ash ・ River Ash, Hertfordshire ・ River Ash, Surrey ・ River Ashburn 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 anticlines ： ウィキペディア英語版 River anticlines A river anticline is a geologic structure that is formed by the focused uplift of rock caused by high erosion rates from large rivers relative to the surrounding areas. An anticline is a fold that is concave down, whose limbs are dipping away from its axis, and whose oldest units are in the middle of the fold. These features form in a number of structural settings. In the case of river anticlines, they form due to high erosion rates, usually in orogenic settings. In a mountain building setting, like that of the Himalaya or the Andes, erosion rates are high and the river anticline's fold axis will trend parallel to a major river. When river anticlines form, they have a zone of uplift between 50-80 kilometers wide along the rivers that form them. ==Cause and Effect== The type of geologic feature that will form is caused by stream power and flexural rigidity of the crust. When stream power increases and flexuaral rigidity decreases, this causes the structure to progress from a transverse anticline to a river anticline, and in extreme cases to a tectonic aneurysm.〔 Transverse anticlines trend in the direction of and form around small rivers with relatively high crustal strength. River anticlines form around large highly erosive rivers where crustal strength is relatively low. Tectonic aneurysms will form when erosion is very high and the crust is very weak, to form a structural welt.〔 The way that river anticlines form via deep river incisions and the associated crustal rebound, cause rocks deep in the crust to be preferentially exhumed along large rivers like the Arun, Indus, Sutlej, and Yarlung Zangbo River.〔 Isolated exhumation causes high pressure and ultra high pressure metamorphic sample to be brought to the surface at sustained rates of up to 5mm per year. Analysis and radiometric dating of these high pressure and ultra high pressure metamorphic rocks can help reconstruct the tectonic evolution of the orogenic belt that formed them.〔 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 anticlines」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.