巻号一覧
1995 巻 (1995)
- 180 号 p. 203-
- 179 号 p. 157-
- 178 号 p. 89-
- 177 号 p. 1-
前身誌
1995 巻, 177 号
選択された号の論文の6件中1～6を表示しています
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YUKIO YANAGISAWA1995 年 1995 巻 177 号 p. 1-20
発行日: 1995/04/30
公開日: 2010/05/25
ジャーナル フリーAn emended definition of the fossil diatom genus Rossiella Desikachary et Maheshwari is presented along with a detailed description of its five member species, including two new ones. The stratigraphic range and geographic distribution of each species based on analysis of some deep-sea cores and literature survey are provided. The genus is closely related to the genera Bogorovia Jouse and Koizumia Yanagisawa, but is clearly distinguished from them by the absence of transapical costae. On the basis of certain characteristic features, the genus Rossiella can be placed in the family Cymatosiraceae Hasle, von Stosch et Syvertsen. Two new species are described, Rossiella fennerae Yanagisawa sp. nov. and R. fourtanierae Yanagisawa sp. nov.抄録全体を表示PDF形式でダウンロード (4368K) -
YUKIO YANAGISAWA1995 年 1995 巻 177 号 p. 21-42
発行日: 1995/04/30
公開日: 2010/05/25
ジャーナル フリーAn emended definition of the fossil diatom genus Bogorovia Jouse is presented along with a detailed description of eight species. The stratigraphic range and geographic distribution of each species are provided based on analysis of deep-sea cores and literature survey. The genus is closely related to the genus Ressiella Desikachary et Maheshwari, but is distinguished from the latter mainly by the presence of transapical costae. It also shows a close resemblance to Koizumia Yanagisawa, but differs mainly by the structure of the marginal ridge. On the basis of certain characteristic features, the genus Bogorovia can be placed in the family Cymatosiraceae Hasle, von Stosch et Syvertsen. Four new species are described and two new combinations are established; Bogorovia barronii Yanagisawa sp. nov., B. curvata Yanagisawa sp. nov., B. puncticulata Yanagisawa sp. nov., B. rostrata Yanagisawa sp. nov., B. gombosii (Desikachary) Yanagisawa comb. nov. and B. lancettula (Schrader) Yanagisawa comb. nov.抄録全体を表示PDF形式でダウンロード (4652K) -
984 Middle and Late Permian radiolarians from the Semanggol Formation, Northwest Peninsular MalaysiaKATSUO SASHIDA, SHUKO ADACHI, HISAYOSHI IGO, TOSHIO KOIKE, IBRAHIM B. ...1995 年 1995 巻 177 号 p. 43-58
発行日: 1995/04/30
公開日: 2010/05/25
ジャーナル フリーThe Semanggol Formation exposed in the northwestern part of Peninsular Malaysia is subdivided into the lower Chert, middle Rhythmite, and upper Conglomerate Members. Previous to the present study, this formation was regarded as Triassic because of the occurrence of Daonella and Halobia in the middle Rhythmite Member. We newly recovered late Middle Permian radiolarians, including Follicucullus monacanthus, from an allochthonous siliceous limestone block contained in the upper part of the lower Chert Member exposed at Bukit Barak, 25km northeast of Alor Setar. Furthermore, moderately well preserved Late Permian radiolarians belonging to the Neoalbaillella optima and N. ornithoformis Assemblages were discovered in chert beds of the same member exposed at Bukit Nyan, 20km east of Alor Setar. These Permian radiolarian faunas are very similar to those reported from Japan, the Philippines, and southern China. We interpret the significance of this occurrence in the paleobiogeography of Peninsular Malaysia during Late Paleozoic to Early Mesozoic times. Eight species and five unidentified species belonging to 10 genera of Radiolaria are systematically described in this paper.抄録全体を表示PDF形式でダウンロード (2679K) -
YASUO KONDO1995 年 1995 巻 177 号 p. 59-64
発行日: 1995/04/30
公開日: 2010/05/25
ジャーナル フリーThe density and relative abundance of smaller (megalospheric) and larger (microspheric) forms of Nummulites provide excellent indicators of sedimentary condensation, dilution and size-sorting during the formation of fossil assemblages, using an inferred 10 : 1 original ratio of the two forms. Various degrees of current sorting were recognized in the sandy facies of Nankinhama of Hahajima, Ogasawara Islands; storm condensation in low-angle, cross-bedded sandstone, winnowing in sandstone beds with strongly imbricated Nummulites tests, and highly diluted occurrence in debris flow deposits. A poorly sorted, pale green, bedded sandstone is interpreted to represent the least disturbed and perhaps indigenous preservation of Nummulites. In this sandstone, the ratio of the two forms is roughly 10 : 1, as for other published examples. No significant modification of density and relative abundance between the two forms occurs in an apparently allochthonous occurrence of Nummulites in conglomeratic debris flows. Therefore, preservation of the original ratio of the two forms of Nummulites does not necessarily exclude transportation.抄録全体を表示PDF形式でダウンロード (1227K) -
TOSHIAKI IRIZUKI, TAKASHI MATSUBARA1995 年 1995 巻 177 号 p. 65-78
発行日: 1995/04/30
公開日: 2010/05/25
ジャーナル フリーSixty-six species in 44 genera of fossil ostracodes are reported for the first time from the lower Middle Miocene Suenomatsuyama Formation, distributed in Ninohe City, Iwate Prefecture, Northeast Japan. Dominating species throughout the formation are Elofsonella cf. concinna (Jones), Neomonoceratina japonica (Ishizaki), Pectocythere daishakaensis Tabuki and Schizocythere kishinouyei (Kajiyama). Vertical changes of species composition of ostracode faunas and Q-mode cluster analysis reveal that the lower part of the Suenomatsuyama Formation is dominated by cool and sublittoral species, while the middle to upper part is marked by sublittoral temperate-water species. Thus, cool to temperate water ostracode species, which appeared abundantly in the middle part of the underlying Kadonosawa Formatiton, lingered on until the deposition time of the Suenomatsuyama Formation, whereas warm-water species became dominant in the upper part. One new species, Laperousecythere ishizakii, is described herein.抄録全体を表示PDF形式でダウンロード (3188K) -
HISAHARU IGO1995 年 1995 巻 177 号 p. 79-83
発行日: 1995/04/30
公開日: 2010/05/25
ジャーナル フリーPDF形式でダウンロード (883K)
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