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Paleoceanographic Changes of the Sea of Japan During 3.5-0.8 Ma

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タイトル: Paleoceanographic Changes of the Sea of Japan During 3.5-0.8 Ma
著者: Kitamura, Akihisa 著作を一覧する
キーワード: Sea of Japan
Warm Tsushima current
Fossil record
Shallow-marine deposits
発行日: 2008年
出版者: 21st Century COE for Neo-Science of Natural History, Hokkaido University
引用: Edited by Hisatake Okada, Shunsuke F. Mawatari, Noriyuki Suzuki, Pitambar Gautam. ISBN: 978-4-9903990-0-9
誌名: Origin and Evolution of Natural Diversity : Proceedings of the International Symposium, The Origin and Evolution of Natural Diversity, held from 1-5 October 2007 in Sapporo, Japan
開始ページ: 187
終了ページ: 194
抄録: On the basis of fossil record from marine deposits in and around the Sea of Japan, the environment during 3.5-0.8 Ma is divided into two stages. During the old stage (3.5-1.71 Ma (stage 60/59)), cold surface water prevailed, except for the short term inflow (< 41 ky duration) of warm Tsushima Current at 3.5, 3.2, 2.9, 2.4 and 1.9 Ma. During the young stage (1.71-0.8 Ma), the Tsushima Current flowed into the sea at every interglacial highstand. This change was caused by opening of the southern channel due to crustal stretching in the northern Okinawa Trough. The onset of inflow of the Tsushima Current caused intrusion of warm-water organisms into the Sea of Japan during interglacial stages and barrier to migration of land organisms between East Asia and Japan. In summary, the environments and organisms in and around the Sea of Japan since 3.5 Ma have been strongly controlled by the development of southern channel (1.71 and 1.35 Ma) and global climate changes (glacial/interglacial cycles).
記述: International Symposium, "The Origin and Evolution of Natural Diversity". 1–5 October 2007. Sapporo, Japan.
資料タイプ: proceedings


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