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タイトル :Fusuline foraminifera from the upper part of the Sakamotozawa Formation, South Kitakami Belt, Northeast Japan
著者 :Ueno, Katsumi
Shintani, Tomohiko
Tazawa, Jun-ichi
公開者・出版者 :新潟大学理学部
刊行年月 :2009-3
掲載誌名 :Science reports of Niigata University. (Geology)
巻 :24
開始ページ :27
終了ページ :61
ISSN :1349-1237
抄録 :Fusuline foraminifera from three stratigraphic levels in the upper part of the Sakamotozawa Formation distributed in the type Nagaiwa-Sakamotozawa area of Hikoroichi, South Kitakami Belt, Northeast Japan, is studied and twenty-two taxa of fusulines belonging to 14 genera are described in this paper, including the first documentation of Misellina species from the type area of the Sakamotozawa Formation. The first level in the uppermost part of the Shiratorizawa Limestone Member contains Chalaroschwagerina ex gr. vulgaris (Schellwien), Pseudofusulina ex gr. kraffti (Schellwien), Praeskinnerella fragilis Leven, Minojapanella (M.) elongata Fujimoto and Kanuma and others, and is referable to the late Yakhtashian. The second level in the lower part of the overlying Shiraishi Sandstone-Limestone Member is broadly referable to the Bolorian based on the occurrences of Pseudofusulina dzamantalensis (Leven), Darvasites minatoi (kanmera and Mikami), and Kubergandella? sp. The third level in the middle part of the Shiraisi Sandstone-Limestone Member yields Misellina sp. together with Pseudofusulina dzamantalensis (Leven) and others, and is certainly assignable to the late Bolorian. In previous studies, these two members in the upper part of the Sakamotozawa Formation as a whole have been correlated to the Yakhtashian, but our present result made clear that they are correlated to the late Yakhtashian and Bolorian, respectively. Thus the Sakamotozawa Series in the regional standard Permian chronostratigraphic subdivisions in Japan rightly corresponds to the Sakmarian to the Bolorian in the standard Permian chronostraigraphic scale of the Tethys region.
キーワード :Bolorian
Early Permian
fusuline foraminifera
Northeast Japan
Sakamotozawa Formation
South Kitakami Belt
Yakhtashian
資料種別 :紀要論文
言語 :eng
フォーマット :application/pdf
URI :http://hdl.handle.net/10191/12953
fullTextURL :http://dspace.lib.niigata-u.ac.jp/dspace/bitstream/10191/12953/1/24_27-61.pdf
出現コレクション:02 Science reports of Niigata University. (Geology)

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