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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 Arcto-Tertiary Geoflora ： ウィキペディア英語版 Arcto-Tertiary Geoflora The Arcto-Tertiary Geoflora is a hypothesized floral assemblage that once covered the Northern Hemisphere, from roughly the late Mesozoic to mid Cenozoic Eras. ==Origins== First proposed by the paleobotanists J.S. Gardner and C. Ettinghausen in 1879, the concept was intended to answer questions about the disjunct distribution of identical or closely related plant species: for instance, magnolia and tulip trees are native to both the Southeast United States and southern China and Indochina.,〔Delcourt, Hazel, ''Forests in Peril'', (Blacksburg: The McDonald and Woodward Publishing Company, 2002), 31-2.〕〔Dougal Dixon et al., ''The Atlas of Life on Earth'', (New York: Barnes & Noble Books, 2001), 334-5.〕 As envisioned, the ATG had a wide distribution when the global climate was much warmer than it is currently, a situation strengthened by the closer position of some of the continents in late Mesozoic to early Cenozoic times.,〔Delcourt, 31.〕〔Dixon et al., 334.〕 With the onset of global cooling and the Ice Ages, the ranges of these tropical to subtropical species were left in isolated pockets of warmer climates.〔Delcourt, 32.〕 The southern, more tropical equivalent of the ATG was the Neotropical Tertiary Geoflora.〔 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「Arcto-Tertiary Geoflora」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.