944. PERMIAN FORAMINIFERS FROM THE TAKAKURAYAMA GROUP OF THE SOUTHERN ABUKUMA MOUNTAINS, NORTHEAST JAPAN
Bibliographic Information
- Other Title
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- 944. 南部阿武隈山地, 高倉山層群からのペルム紀有孔虫類
- 南部阿武隈山地,高倉山層群からのペルム紀有孔虫類〔英文〕
- ナンブ アブクマ サンチ タカクラサンソウグン カラ ノ ペルムキ ユウコウチュ
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Abstract
Permian foraminifers are abundantly discriminated from the limestone pebbles and matrix of the conglomerate member in the Motomura Formation of the Takakurayama Group distributed in the southern Abukuma Mountains. Based on microfacies and fossil contents, these limestone pebbles are classified into five types, denoted Types Ia, Ib, Ic, IIa and IIb. Type I pebbles contain Toriyamaia laxiseptata Kanmera, Minojapanella (M.) elongata Fujimoto and Kanuma, Chalaroschwagerina vulgaris (Schellwien), Pseudofusulina fusiformis (Schellwien), and Misellina (Brevaxina) sp., and are considered to be of Yakhtashian to early Bolorian age. Type IIa pebbles yield Yangchenia cf. iniqua Lee, Pseudodoliolina cf. ozawai Yabe and Hanzawa, and P. aff. pseudolepida (Deprat), and are surely referable to an early Murgabian age. Type IIb pebbles contain Wutuella cf. wutuensis (Kuo), Minojapanella (M.) parva Sheng, and Lantschichites? sp., and are considered to be of late Murgabian age. Colania sp., indicative of a late Murgabian age, occurs in the matrix of the conglomerate. Fusulinaceans in the Type IIb pebbles and matrix indicate a geologic age of, at least, the Motomura Formation. Judging from stratigraphic and paleontologic evidence in the Iriishikura and Kashiwadaira Formations, the Takakurayama Group, as a whole, seems to be correlated with the late Middle Permian (late Murgabian). In this paper, 19 species of foraminifers including one new genus, Quasireichelina, and four new species, Codonofusiella abukumaensis, Dunbarula planata, Quasireichelina expansa, and Neodiscus mirabilis, are described.
Journal
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- Transactions and proceedings of the Paleontological Society of Japan. New series
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Transactions and proceedings of the Paleontological Society of Japan. New series 1992 (168), 1265-1295, 1992
PALAEONTOLOGICAL SOCIETY OF JAPAN
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Details 詳細情報について
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- CRID
- 1390282680410452224
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- NII Article ID
- 110002703345
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- NII Book ID
- AA00867896
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- ISSN
- 21860963
- 00310204
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- NDL BIB ID
- 3806116
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- Data Source
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- JaLC
- NDL
- CiNii Articles
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- Abstract License Flag
- Disallowed
