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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 Himalayan foreland basin ： ウィキペディア英語版 Himalayan foreland basin The Himalayan foreland basin is an active collisional foreland basin system that developed adjacent to the Himalayan mountain belt in response to the weight of crustal thickening when the Indian Plate collided and subducted under the Eurasian plate. With a width of and long, the foreland basin span to five countries which include: India, Nepal, Pakistan, Bhutan, and Bangladesh. Sedimentary rock records gathered on the greater Himalayan area surrounding India and Nepal traces back to the onset development of the foreland basin which started at the Paleogene period around 45-50 Ma to the time where India and Asia collided. A debate has arise that the basin exhibits the concept of progressive suturing (diachroneity) which means a lag in time exists between parts of the basin; it was inferred the development of the western part of basin started at the Paleocene period around 57-54 Ma with the central part having 2 Ma in difference, and gets younger as it progresses towards the eastern side. The various stratigraphic succession of the basin is important as it preserves the evidence of the India-Eurasia collision as well as relating it to the Himalayan Orogenesis. == Geologic setting == During the Late Cretaceous, the northward drifting Indian plate covered a great distance during the closure of the Neo-Tethys Ocean when India finally collided with the Eurasian plate. Both continental plates are relatively low density and cannot be subducted, resulting in the Eurasian plate (Tibetan Plateau) being thrusted up and the subsequent development of the Himalayan mountain range to the south. The foreland basin is adjacent to the Himalayan mountain belt and is bordered by the Indian Craton on the South, the Tibetan Plateau on the north and is located south of the Indus-Yarlung suture zone. The foreland basin much like the Himalayan mountain range, span approximately west to east across India, Nepal, Bhutan and Bangladesh. The present day foreland basin is now widely known as the Indo-Gangetic plain which is mostly "U" and wedge shaped, and sits mostly on the Indian Craton. 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「Himalayan foreland basin」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.