Location 1 - Shimokine Fm, Rumoi: Late/Upper Eocene, Japan
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Bivalvia
- Carditida
- Carditidae
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Venericardia yokoyamai
(Oyama and Mizuno 1958)
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| original and current combination Venericardia (Cyclocardia) yokoyamai | |||||||
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Venericardia tokudai
Takeda 1953
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Bivalvia
- Thraciida
- Thraciidae
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Thracia sp.
Blainville 1824
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| see common names | |||||||
Geography
| Country: | Japan |
| Coordinates: | 44.0° North, 141.9° East (view map) |
| Paleocoordinates: | 46.3° North, 138.1° East |
| Basis of coordinate: | based on nearby landmark |
| Geographic resolution: | outcrop |
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
| Geological group: | Tappu | Formation: | Shimokine | ||
| Stratigraphic resolution: | formation | ||||
| Stratigraphy comments: STRATIGRAPHIC RELATIONS: From Shimokine Fm of the Tappu Gp, a correlative of the Poronai and Shimizusawa Fm. THICKNESS: From bed with formation which reaches a thickness of 500 m. AGE: Late Eocene on the basis of molluscan biostratigraphy. STRATIGRAPHIC POSITION: Unknown position within formation. | |||||
Lithology and environment
| Primary lithology: | fine,medium lithified sandstone |
| Includes fossils? | Y |
| Lithology description: SPECIFIC LITHOLOGY: Medium-fine grained sandstone. LITHIFICATION: Assume to be lithified on the basis of age. | |
| Environment: | coastal indet. |
| Geology comments: ENVIRONMENT: Shallow marine, siliciclastic environment. | |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils |
Collection methods and comments
| Collection methods: | field collection |
| Reason for describing collection: | biostratigraphic analysis |
| Collection method comments: COLLECTOR: K. Kubo. REPOSITORY: Unknown, not stated in text. | |
| Taxonomic list comments:COVERAGE: Exhaustive for bivalvia and gastropoda. NOMENCLATURE: Somewhat antiquated, but with species-level identifications. | |
Metadata
| Database number: | 71027 | ||
| Authorizer: | A. Hendy | Enterer: | A. Hendy |
| Modifier: | A. Hendy | Research group: | marine invertebrate |
| Created: | 2007-04-14 23:05:07 | Last modified: | 2013-11-25 13:37:23 |
| Access level: | authorizer only | Released: | 2008-04-14 23:05:07 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 23771. | A. Mizuno. 1964. Summary of the Paleogene molluscan faunas in North Japan. Geological Survey of Japan Report 207 [A. Hendy/A. Hendy/A. Hendy] |