Kawamagari Fm - Asakusa: Late/Upper Eocene, Japan
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Gastropoda
- Neogastropoda
- Buccinidae
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Siphonalia asakuraensis
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Gastropoda
- Neogastropoda
- Volutidae
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Volutospina ? nishimurai
Nagao 1928
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Gastropoda
- Strombidae
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"Rimella" sp.
Agassiz 1840
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Gastropoda
- Thersiteidae
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"Orthaulax" japonicus
Nagao 1924
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Bivalvia
- Nuculida
- Nuculidae
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Nucula hizenensis
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Bivalvia
- Mytilida
- Crenellidae
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Crenella striatocostata
Nagao 1928
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Bivalvia
- Ostreida
- Pinnidae
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Pinna asakuraensis
Nagao 1928
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Bivalvia
- Cardiida
- Veneridae
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Pitar kyushuensis
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Bivalvia
- Lucinida
- Lucinidae
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Eomiltha sp.
Cossmann 1912
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| spelled with current rank as Gibbolucina (Eomiltha) | |||||||
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Bivalvia
- Carditida
- Carditidae
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Venericardia nagaoi n. sp.
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| see common names | |||||||
Geography
| Country: | Japan |
| Coordinates: | 32.4° North, 130.2° East (view map) |
| Paleocoordinates: | 39.3° North, 125.4° 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: | Kawamagari | ||||
| Stratigraphic resolution: | formation | ||||
| Stratigraphy comments: STRATIGRAPHIC RELATIONS: From Kawamagari Fm, which locally overlies the Hoshuyama Fm (Middle Eocene), and is overlain by the Doshi Fm (Late Eocene). THICKNESS: From formation that attains a thickness of <50 m. AGE: Late Eocene, based on molluscan biostratigraphy. STRATIGRAPHIC POSITION: Composite list for the formation in this local area. | |||||
Lithology and environment
| Primary lithology: | glauconitic,green lithified sandstone |
| Includes fossils? | Y |
| Lithology description: SPECIFIC LITHOLOGY: Green-colored, glauconitic 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: Nagao (c. 1928). 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: | 70926 | ||
| Authorizer: | A. Hendy | Enterer: | A. Hendy |
| Modifier: | A. Hendy | Research group: | marine invertebrate |
| Created: | 2007-04-11 21:19:46 | Last modified: | 2013-11-25 13:37:23 |
| Access level: | authorizer only | Released: | 2008-04-11 21:19:46 |
| 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] |