著者
北村 晃寿
出版者
日本古生物学会
雑誌
化石 (ISSN:00229202)
巻号頁・発行日
no.63, pp.40-48, 1997-12-20
被引用文献数
1

The middle part of the early Pleistocene Omma Formation (1.5-1.0Ma) is composed of eleven depositional sequences caused by glacio-eustatic sea-level changes associated with Milankovitch cycles (41, 000-year orbital obliquity). Each depositional sequence contains inner shelf sediments of transgressive and high-stand systems tracts. Within each depositional sequence the molluscan fauna changes from cold-water associations to warm-water associations, followed again by cold-water associations. On the basis of detailed stratigraphic distributions of molluscs and planktonic foraminifers, the following events can be recognized during the warming interval from a glacial stage to an interglacial stage : 1. initiation of inflow of the warm Tsushima Current into the Japan Sea, 2. local extinction of cold-water molluscs, 3. absence of both cold-and warm-water molluscs, 4. successful migration of warm-water molluscs. The absence of both elements may have been caused by high seasonal fluctuations of water temperature associated with the unstable inflow of the Tsushima Current.

言及状況

Twitter (1 users, 2 posts, 0 favorites)

こんな論文どうですか? ミランコビッチ・サイクルに伴う環境変動に対する海生貝類の応答様式(北村晃寿),1997 http://id.CiNii.jp/LVe9L
こんな論文どうですか? ミランコビッチ・サイクルに伴う環境変動に対する海生貝類の応答様式,1997 http://ci.nii.ac.jp/naid/110002704253

収集済み URL リスト