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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 Central American Seaway ： ウィキペディア英語版 Central American Seaway The Central American Seaway, also called the Panamanic Seaway or Inter-American Seaway was an ancient body of water that once separated North America from South America. It formed in the Mesozoic (200-154 mya) during the separation of the Pangaean supercontinent, and closed when the Isthmus of Panama was formed by volcanic activity in the late Pliocene (2.76-2.54 mya). The closure of the Central American Seaway had tremendous effects on oceanic circulation and the biogeography of the adjacent seas, isolating many species and triggering speciation and diversification of tropical and sub-tropical marine fauna. The inflow of nutrient-rich water of deep Pacific origin into the Caribbean was blocked, so local species had to adapt to an environment of lower productivity. It had an even larger impact on terrestrial life. The seaway had isolated South America for much of the Cenozoic, allowing the evolution of a wholly unique diverse mammalian fauna there; when it closed, a faunal exchange with North America ensued, leading to the extinction of many of the native South American forms. == See also == *Atlantic Meridional Overturning Circulation *Great American Interchange *North Atlantic Deep Water *Paleoceanography 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「Central American Seaway」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.