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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 Blue Nile rift ： ウィキペディア英語版 Blue Nile rift The Blue Nile rift is a major geological formation in the Sudan, a rift with a NW trend that terminates on the Central African Shear Zone. It was formed through crustal extension during the break-up of Gondwana. The rift, and other rifts in the area such as the Bahr El Arab rift and White Nile rift, appears to have been activated several times since the Paleozoic era, which ended about 250 Ma.〔Ma = Million years ago〕 During periods of rapid uplift and subsidence, the rifts accumulated sediments of different ages, origins and methods of deposition. Late Jurassic rifting occurred in the Blue Nile rift, with east-west half-graben extension connected by large-scale shear zones and pull-apart basins, and early Cretaceous rifting re-activated the Jurassic basin. The Blue Nile Basin in Ethiopia may be a southeastern extension of the rift.〔 Further to the southeast, the late Palaeozoic-Mesozoic Ogaden Rift is aligned with the Blue nile rift. ==Explanatory notes== 〔 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「Blue Nile rift」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.