Yubetsu Mbr - Kushiro: Late/Upper Eocene, Japan
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Gastropoda
- Turritellidae
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Turritella sp.
Lamarck 1799
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Bivalvia
- Ostreida
- Ostreidae
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Ostrea eorivularis
Oyama and Mizuno 1958
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Bivalvia
- Pholadida
- Myidae
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Mya kusiroensis
Nagao and Inoue 1941
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| synonym of Mya (Arenomya) grewingki | |||||||
| see common names | |||||||
Geography
| Country: | Japan |
| Coordinates: | 43.0° North, 144.4° East (view map) |
| Paleocoordinates: | 45.3° North, 140.8° 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
| Geological group: | Urahoro | Formation: | Teshibetsu | Member: | Yubetsu |
| Stratigraphic resolution: | member | ||||
| Stratigraphy comments: STRATIGRAPHIC RELATIONS: From Yubetsu coal-bearing member of the Teshibetsu Fm, Urahoro Gp (Middle Eocene) and underlies the Soun coal-bearing mbr and overlies the "Tenneru" Fm. THICKNESS: From unit which reaches a thickness of 150-170 m. AGE: Late Eocene based on molluscan biostratigraphy. STRATIGRAPHIC POSITION: Composite checklist for unit from local area. | |||||
Lithology and environment
| Primary lithology: | lithified "siliciclastic" |
| Includes fossils? | Y |
| Lithology description: SPECIFIC LITHOLOGY: Unknown lithology. LITHIFICATION: Assume to be lithified on the basis of age. | |
| Environment: | marginal marine indet. |
| Geology comments: ENVIRONMENT: Brackish and fluvial faunal assemblage. | |
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: T. Mizuno and Hyakkoku (c. 1960). REPOSITORY: Unknown, not stated in text. | |
| Taxonomic list comments:COVERAGE: Only includes characteristic bivalvia and gastropoda. NOMENCLATURE: Somewhat antiquated, but with species-level identifications. | |
Metadata
| Database number: | 71045 | ||
| Authorizer: | A. Hendy | Enterer: | A. Hendy | Research group: | marine invertebrate |
| Created: | 2007-04-15 00:13:31 | Last modified: | 2013-11-25 13:37:23 |
| Access level: | authorizer only | Released: | 2007-04-15 00:13:30 |
| 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] |