Shiranuka Fm - SNY-2: Early/Lower Pliocene, Japan
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Gastropoda
- Neogastropoda
- Buccinidae
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Buccinidae indet.
Rafinesque 1815
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Bivalvia
- Nuculanida
- Yoldiidae
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Yoldia sp.
Möller 1842
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Bivalvia
- Cardiida
- Cardiidae
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Clinocardium sp.
Keen 1936
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Bivalvia
- Cardiida
- Tellinidae
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Macoma (Macoma) tokyoensis
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Bivalvia
- Pholadida
- Myidae
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Mya (Mya) cuneiformis
(Bohm 1915)
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| see common names | |||||||
Geography
| Country: | Japan |
| Coordinates: | 43.0° North, 134.1° East (view map) |
| Paleocoordinates: | 43.2° North, 133.5° East |
| Basis of coordinate: | estimated from map |
| Geographic resolution: | outcrop |
Time
| Period: | Neogene | Epoch: | Pliocene |
| Stage: | Zanclean | 10 m.y. bin: | Cenozoic 6 |
| Key time interval: | Early/Lower Pliocene | ||
| Age range of interval: | 5.33300 - 3.60000 m.y. ago |
Stratigraphy
| Formation: | Shiranuka | ||||
| Stratigraphic resolution: | bed | ||||
| Stratigraphy comments: STRATIGRAPHIC RELATIONS: From Shiranuka Fm, which overlies the Atsunai Fm (Middle Miocene) of the Atsunai Gp, and is overlain by Pleistocene terraces. THICKNESS: From bed with formation that attains a thickness of 350 m. AGE: latest Late Miocene-Pliocene on the basis of molluscan biostratigraphy; Takikawa-Hombetsu stage (6.0-2 Ma); some debate over age - some author refer fauna strictly to the Pliocene. STRATIGRAPHIC POSITION: From unknown position within the Shiranuka Fm. | |||||
Lithology and environment
| Primary lithology: | gray lithified sandstone |
| Secondary lithology: | gray lithified siltstone |
| Includes fossils? | Y |
| Lithology description: SPECIFIC LITHOLOGY: Gray sandstone and siltstone. LITHIFICATION: Lithified, on the basis of facies description. | |
| Environment: | transition zone/lower shoreface |
| Geology comments: ENVIRONMENT: Assemblage appears to be derived from an shallow shelf siliciclastic environment. TEMPERATURE: Mollusca suggest cool-water conditions. | |
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: Y. Honda. REPOSITORY: Institute of Geology and Paleontology, Tohoku University, Sendai, Japan (IGPS). | |
| Taxonomic list comments:COVERAGE: Exhaustive for gastropoda and bivalvia. NOMENCLATURE: Authoritative publication with subgeneric and species-level assignments. | |
Metadata
| Database number: | 70408 | ||
| Authorizer: | A. Hendy | Enterer: | A. Hendy | Research group: | marine invertebrate |
| Created: | 2007-03-21 22:18:18 | Last modified: | 2013-11-25 13:37:23 |
| Access level: | authorizer only | Released: | 2007-03-21 22:18:17 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 23610. | Y. Honda. 1988. Molluscan fossils from the Atsunai Group, Kushiro Coal Field, Eastern Hokkaido, Northern Japan. Sato Ho-on Kai Special Publication (Profesoor T. Kotaka Commemorartive Volume) 351-363 [A. Hendy/A. Hendy] |