Sampling Localities IV/V, Hijikara Formation, Near Ohta, Japan: Pliocene, Japan
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Buliminidae
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Nodosariata
- Nodosariida
- Stilostomellidae
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Globorotaliidae
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Globigerinidae
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Globothalamea
- Rotaliida
- Gavelinellidae
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Gyroidina orbicularis
d'Orbigny 1865
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Bolivinitidae
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Uvigerinidae
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unclassified
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| Lishkeia argent. hirasei | ||||||||||
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Bivalvia
- Protobranchia
- Yoldiidae
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Yoldia similis
Kuroda and Habe 1952
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Bivalvia
- Protobranchia
- Malletiidae
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Bivalvia
- Protobranchia
- Tindariidae
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| see common names | ||||||||||
Geography
| Country: | Japan |
| Coordinates: | 36.3° North, 139.4° East (view map) |
| Paleocoordinates: | 36.1° North, 138.5° East (Wright 2013) |
| Basis of coordinate: | based on nearby landmark |
| Geographic resolution: | local area |
Time
| Period: | Neogene | Epoch: | Pliocene |
| 10 m.y. bin: | Cenozoic 6 | ||
| Key time interval: | Pliocene | ||
| Age range of interval: | 5.333 - 2.58 m.y. ago |
Stratigraphy
Lithology and environment
| Primary lithology: | fine poorly lithified silty mudstone |
| Secondary lithology: | tuff |
| Includes fossils? | Y |
| Lithology description: thick bedded mudstone interbedded with T-3 tuff. Figure 1 of paper illustrates this formation as coarse-grained siltstone grading to the southeast into a fine-grained siltstone. This formation grades to the northwest into the fine grained sandstone of the Ukari fm. | |
| Environment: | marine indet. |
| Geology comments: This formation was said to be deposited on a slope and in a geosynclinal trough in front of the shelf. | |
Taphonomy
| Modes of preservation: | body,original aragonite,original calcite |
| Size of fossils: | macrofossils,mesofossils,microfossils |
| Articulated whole bodies: | some |
| Disassociated major elements: | some |
Collection methods and comments
| Collection excludes: | some microfossils |
| Collection methods: | bulk,field collection |
| Reason for describing collection: | general faunal/floral analysis |
| Collection method comments: There were 200-1500 individual forams present in each sample. The number of mollusc individuals per sample is not reported. Forams were extracted from blocks of sediment weighing 1-2kg each. | |
| Taxonomic list comments: Molluscs reported are all observed taxa in the given area. Forams in list are only those that were analyzed for oxygen isotope ratios and include only the most common foram species. | |
Metadata
| Also known as: | Samples 30, 312,313, and 315 | ||
| Database number: | 45528 | ||
| Authorizer: | A. Miller | Enterer: | K. Bulinski |
| Modifier: | K. Bulinski | Research group: | marine invertebrate |
| Created: | 2004-10-29 12:10:37 | Last modified: | 2025-02-22 15:12:02 |
| Access level: | the public | Released: | 2004-10-29 12:10:37 |
| Creative Commons license: | CC0 | ||
Reference information
Primary reference:
| 11828. | K. Chinzei and M. Aoshima. 1976. Marine Thermal Structure of the Plio-Pleistocene Warm Water in Central Japan. Journal of the Faculty of Science, University of Tokyo 19(3):179-203 [A. Miller/K. Bulinski/K. Bulinski] |