First Occurrence of Eocene Nautilids from the Miyaragawa Formation in Ishigaki-jima Island, the Ryukyus, Southwest Japan.
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Accession number;02A0325295
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| Title;First Occurrence of Eocene Nautilids from the Miyaragawa Formation in Ishigaki-jima Island, the Ryukyus, Southwest Japan. |
| Author;
NODA H
(National Sci. Museum, Tokyo, Jpn)
()
DOI N
(Jmc Geothermal Engeneering Co., Ltd., Iwate Prefecture, Jpn)
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Journal Title;Bull Natl Sci Mus Ser C
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Journal Code:S0397B
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ISSN:0385-244X
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VOL.27;NO.3/4;PAGE.89-100(2001)
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| Figure&Table&Reference;FIG.5, TBL.1, REF.21 |
| Pub. Country;Japan |
| Language;English |
| Abstract;Two species of Eocene nautilid, Aturia yokoyamai Nagao and Eutrephoceras japonicus (Shimizu) were first discovered from the Miyaragawa Formation in Ishigaki-jima Island, the Ryukyus. From the associated molluscan species as Vicarya, Terebra and Colpospira, this occurrence shows the tropical shallow sea environment at Eocene. However, the sediments deposited inside of the nautilid specimens together with subangular pebbles in sandstone show off shore and active marine condition. (author abst.) |
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