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Paleogene Molluscan Faunas from the Kushiro Coal Field, Eastern Hokkaido
http://hdl.handle.net/10097/28865
http://hdl.handle.net/10097/2886563c10ab1-bd4e-4d8c-9a80-5e7203add175
名前 / ファイル | ライセンス | アクション |
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KJ00004213371.pdf (17.1 MB)
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Item type | 紀要論文 / Departmental Bulletin Paper(1) | |||||
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公開日 | 2008-05-02 | |||||
タイトル | ||||||
タイトル | Paleogene Molluscan Faunas from the Kushiro Coal Field, Eastern Hokkaido | |||||
言語 | ||||||
言語 | eng | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | Paleogene | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | molluscs | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | faunal provinces | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | paleobiogeography | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | Kushiro coal field | |||||
資源タイプ | ||||||
資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
資源タイプ | departmental bulletin paper | |||||
著者 |
Honda, Yutaka
× Honda, Yutaka |
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抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | The Urahoro Group consists of sandstone and conglomerate, with intercalated coal seams, and yields nonmarine and shallow marine molluscs, including Ostrea. Chlamys, Corbicula, Nemocardium and Mya. The Ombetsu Group rests unconformably upon the Urahoro Group, and consists of siltstone, with a basal sandstone. It yields shallow (and a few deep) marine molluscs, including Yoldia, Portlandia, Acila, Cyclocardia, Turritella, Dentalium, Eocylichna, Orectospira, Clinocardium, Neverita, Conchocele, Macoma, Periploma and Profulvia. These faunas are characterized by many cold water taxa that are widespread today in the northern Pacific. The Urahoro and Ombetsu molluscs include many species in common with those of Oligocene strata of central Hokkaido, Honshu. Japan, and Sakhalin. Kamchatka, and the Koryak Upland, eastern USSR. In contrast, they include only a few species in common with those of Oligocene strata of Kyushu, southern Japan. It is notable that several genera originated during the Late Eocene or Oligocene in Japan and Sakhalin, including Neptunea, Clinocardium and Mya. These facts imply that a significant number of northwestern Pacific taxa might have migrated eastward during Paleogene time. This is also indicated by the presence of 25% Asiatic species in western Gulf of Alaska Paleogene molluscan faunas, and a decline to only 12% Asiatic species in coeval eastern Gulf of Alaska faunas (Marincovich and McCoy, 1984). Seven species of bivalves and two species of gastropods are newly described herein : Nucula (Ennucula) omagariensis, Crenella (Megacrenella) shitakaraensis, C. (Megacrenella) nuibetsuensis, Cyclocardia poronaiensis, Solen shitakaraensis, Thracia (Thracia) shitakaraensis, Cardiomya (Cardiomya) kotakai, Turritella (Hataiella) nuibetsuensis, and Neptunea ogasawarai. | |||||
書誌情報 |
The science reports of the Tohoku University. Second series, Geology = 東北大学理科報告. 地質学 巻 60, 号 1, p. 1-A20, 発行日 1989-11-30 |
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ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 0082464X | |||||
書誌レコードID | ||||||
収録物識別子タイプ | NCID | |||||
収録物識別子 | AA00836349 | |||||
フォーマット | ||||||
内容記述タイプ | Other | |||||
内容記述 | application/pdf | |||||
著者版フラグ | ||||||
出版タイプ | VoR | |||||
出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 | |||||
出版者 | ||||||
出版者 | Tohoku University | |||||
資源タイプ | ||||||
内容記述タイプ | Other | |||||
内容記述 | 紀要類(bulletin) | |||||
登録日 | ||||||
日付 | 2008-05-02 | |||||
日付タイプ | Created | |||||
公開日(投稿完了日) | ||||||
日付 | 2008-05-02 | |||||
日付タイプ | Created | |||||
発行日 | ||||||
日付 | 1989-11-30 | |||||
日付タイプ | Created | |||||
フォーマット | ||||||
内容記述タイプ | Other | |||||
内容記述 | 17128133 bytes | |||||
公開範囲 | ||||||
値 | 学外 | |||||
更新日 | ||||||
日付 | 2010-01-27 | |||||
日付タイプ | Created |