Wakkawenbetsu River: Burdigalian, Japan
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Osteichthyes
- Cetacea
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| 1 specimen | ||||||||||
| NMV-72 | ||||||||||
| see common names | ||||||||||
Geography
| Country: | Japan | State/province: | Hokkaido | County: | Nakagawa |
| Coordinates: | 44.6° North, 142.0° East (view map) | ||||
| Paleocoordinates: | 44.8° North, 138.4° East (Wright 2013) | ||||
| Basis of coordinate: | stated in text |
Time
| Period: | Neogene | Epoch: | Miocene |
| Stage: | Burdigalian | 10 m.y. bin: | Cenozoic 5 |
| Key time interval: | Burdigalian | ||
| Age range of interval: | 20.45 - 15.98 m.y. ago |
Stratigraphy
| Formation: | Yamato | ||||
| Stratigraphy comments: upper lower Miocene: To rigorously estimate the age of the specimen, we thrice attempted to obtain diatom fossils from the matrix of the specimen. However, no diatom fossils have yet been obtained. |
Lithology and environment
| Primary lithology: | fine sandstone |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils |
Collection methods and comments
| Collection methods: | surface (float) |
| Reason for describing collection: | general faunal/floral analysis |
| Collection method comments: collected as float | |
Metadata
| Database number: | 158284 | ||
| Authorizer: | M. Uhen | Enterer: | M. Uhen | Research group: | vertebrate |
| Created: | 2014-07-17 11:02:06 | Last modified: | 2025-02-22 15:12:02 |
| Access level: | the public | Released: | 2014-07-17 11:02:06 |
| Creative Commons license: | CC0 |
Reference information
Primary reference:
| 51983. | M. Murakami, C. Shimada, Y. Hikida and H. Hirano. 2014. Asymmetrical Basal Delphinoid Skull from the Upper Lower Miocene Yamato Formation of Hokkaido, Northern Japan: Implications on Evolution Of Cranial Asymmetry and Symmetry in Odontoceti. Paleontological Research 18(3):134-149 [M. Uhen/M. Uhen] |