Okinoshima Fm (lower part) - Okinoshima: Late/Upper Eocene, Japan
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Gastropoda
- Naticidae
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Polinices nomii
Nagao 1928
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| recombined as Pliconacca nomii | |||||||
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Gastropoda
- Neogastropoda
- Volutidae
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Volutospina ? nishimurai
Nagao 1928
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Gastropoda
- Thersiteidae
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"Orthaulax" japonicus
Nagao 1924
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Bivalvia
- Ostreida
- Gryphaeidae
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Pycnodonta cassis
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| corrected as Pycnodonte | |||||||
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Bivalvia
- Arcida
- Glycymerididae
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Glycymeris cf. altoumbonata
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Bivalvia
- Cardiida
- Psammobiidae
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Psammotaea equideclivis
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| spelled with current rank as Sanguinolaria (Psammotaea) | |||||||
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Bivalvia
- Carditida
- Carditidae
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Venericardia nipponica
Yokoyama 1911
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C category | ||||||
| recombined as Venericardia (Venericor) nipponica | |||||||
| see common names | |||||||
Geography
| Country: | Japan |
| Coordinates: | 32.7° North, 132.6° East (view map) |
| Paleocoordinates: | 39.8° North, 127.9° East |
| Basis of coordinate: | based on nearby landmark |
| Geographic resolution: | local area |
Time
| Period: | Paleogene | Epoch: | Eocene |
| Stage: | Priabonian | 10 m.y. bin: | Cenozoic 3 |
| Key time interval: | Late/Upper Eocene | ||
| Age range of interval: | 37.71000 - 33.90000 m.y. ago |
Stratigraphy
| Formation: | Okinoshima | ||||
| Stratigraphic resolution: | member | ||||
| Stratigraphy comments: STRATIGRAPHIC RELATIONS: From Okinoshima Fm, which regionally overlies the Middle Eocene Hashima Fm, and underlying the Lower Iojima Fm (Late Eocene). THICKNESS: From portion of formation that attains a thickness of ~200 m. AGE: Late Eocene, based on molluscan biostratigraphy. STRATIGRAPHIC POSITION: From lower part of formation. | |||||
Lithology and environment
| Primary lithology: | fine,medium,glauconitic,green lithified sandstone |
| Includes fossils? | Y |
| Lithology description: SPECIFIC LITHOLOGY: Green-colored, glauconite-bearing, fine-medium grained sandstone. LITHIFICATION: Presumed lithified on the basis of age. | |
| Environment: | coastal indet. |
| Geology comments: ENVIRONMENT: Shallow sea, soft-bottom siliciclastic bottom. | |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils |
Collection methods and comments
| Collection methods: | surface (float),field collection |
| Reason for describing collection: | biostratigraphic analysis |
| Collection method comments: COLLECTOR: A. Mizuno (c. 1964). REPOSITORY: Not stated in text, unknown. | |
| Taxonomic list comments:COVERAGE: Exhaustive for gastropoda and bivalvia. NOMENCLATURE: Farly modern nomenclature, and species-level assignments. | |
Metadata
| Database number: | 70919 | ||
| Authorizer: | A. Hendy | Enterer: | A. Hendy |
| Modifier: | A. Hendy | Research group: | marine invertebrate |
| Created: | 2007-04-11 20:45:53 | Last modified: | 2013-11-25 13:37:23 |
| Access level: | authorizer only | Released: | 2008-04-11 20:45:53 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 23772. | A. Mizuno. 1964. Paleogene and Early Neogene molluscan faunae in West Japan. Geological Survey of Japan Report 204 [A. Hendy/A. Hendy] |