Okinoshima Fm (upper part) - Okinoshima: Late Eocene, Japan
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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unclassified
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| A category | |||||||
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Bivalvia
- Protobranchia
- Nuculidae
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| A category | |||||||
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Bivalvia
- Adapedonta
- Solenidae
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Solena sp.
Mörch 1853
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Bivalvia
- Cardiida
- Tellinidae
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Angulus sp.
Megerle 1811
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R category | ||||||
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Bivalvia
- Venerida
- Veneridae
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| C category | |||||||
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Bivalvia
- Venerida
- Mactridae
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Mactra sp.
Linnaeus 1767
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R category | ||||||
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Bivalvia
- Pholadomyida
- Pholadomyidae
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Pholadomya "margaritacea
(Sowerby 1821)
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Bivalvia
- Carditida
- Carditidae
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Venericardia okinoshimensis n. sp.
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C category | ||||||
| C | |||||||
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Gastropoda
- Neogastropoda
- Volutidae
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| C category | |||||||
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Gastropoda
- Neogastropoda
- Muricidae
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| R category | |||||||
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Gastropoda
- Neogastropoda
- Fasciolariidae
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Gastropoda
- Calyptraeidae
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Calyptraea sp.
Lamarck 1799
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R category | ||||||
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Gastropoda
- Turritellidae
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| C category | |||||||
| see common names | |||||||
Geography
| Country: | Japan |
| Coordinates: | 32.7° North, 132.6° East (view map) |
| Paleocoordinates: | 37.0° North, 129.1° East (Wright 2013) |
| 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 Eocene | ||
| Age range of interval: | 37.71 - 33.9 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 upper 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: | 70920 | ||
| Authorizer: | A. Hendy | Enterer: | A. Hendy |
| Modifier: | A. Hendy | Research group: | marine invertebrate |
| Created: | 2007-04-11 20:46:24 | Last modified: | 2025-02-22 15:12:02 |
| Access level: | authorizer only | Released: | 2008-04-11 20:46:24 |
| Creative Commons license: | CC0 |
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] |