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Twelve species of the Upper Triassic ammonites obtained from the Nakijin Formation of Okinawa-jima are systematically described on the basis of numerous specimens. Many of them are referred to the kno...wn species and are mostly of the Tethys and the North Pacific elements, with the closest similarity to those of the European Alps and Himalayas. For the Triassic in Japan they are entirely new. In the formation two ammonoid zones are recognized, of which the lower, the Sirenites cf. nanseni zone, is assigned to the Lower Carnian and the upper, the Juvavites (J.) cf. kellyi zone, to the Upper Carnian.続きを見る
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1.Introduction 2.Acknowledgements 3.The Ammonoid zones of the Upper Triassic Carnian Series 4.Review of Japanese Carnian Ammonites 5.Systematic descriptions 6.Ammonoid faunal assemblage in Okinawa 7.Correlation 8.Concluding remarks 9.References
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Mendeley出力
20_02_p195