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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 North Atlantic breakup ： ウィキペディア英語版 North Atlantic breakup The North Atlantic breakup is a geological event that occurred over millions of years, during which the supercontinent Pangea broke up. As modern-day Europe (Eurasian plate) and North America (North American Plate) separated during the final breakup of Pangea in the early Cenozoic Era,〔(【引用サイトリンク】work=Encyclopedia Britannica Online )〕 they formed the North Atlantic Ocean. Geologists believe the breakup occurred either due to primary processes of the Iceland plume or secondary processes of lithospheric extension from plate tectonics. ==Description== The North Atlantic geographic area comprises the North Atlantic ocean, Iceland, Greenland, the United Kingdom, Denmark and Norway.〔''The North Atlantic Igneous Province: Stratigraphy, Tectonic, Volcanic and Magmatic Processes''; Editors: Jolley and Bell; The Geological Society of London, 2002; Contents ()〕 The supercontinent known as Pangea existed during the late Paleozoic and early Mesozoic eras and began to rift around 200 million years ago.〔Plate Tectonics and Crustal Evolution, Third Ed., 1989, by Kent C. Condie, Pergamon Press〕 Pangea had three major phases of breakup. The first major phase began in the Early-Middle Jurassic, taking place between North America and Africa.〔Zeeya Merali, Brian J. Skinner, Visualizing Earth Science, Wiley, ISBN 978-0-470-41847-5〕 The second major phase of breakup began in the Early Cretaceous. The South Atlantic Ocean opened around 140 million years ago as Africa separated from South America, and about the same time, India separated from Antarctica and Australia, forming the central Indian Ocean. The final major phase of breakup occurred in the early Cenozoic, as Laurentia separated from Eurasia.〔Zeeya Merali, Brian J. Skinner, Visualizing Earth Science, Wiley, ISBN 978-0-470-41847-5〕 As the two plates broke free from each other, the Atlantic Ocean continued to expand.〔Zeeya Merali, Brian J. Skinner, Visualizing Earth Science, Wiley, ISBN 978-0-470-41847-5〕 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「North Atlantic breakup」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.