Tributary of Tonai-zawa River: Early Maastrichtian, Japan
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Cephalopoda
- Ammonitida
- Tetragonitidae
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| (1 measurement) | ||||||||||
| see common names | ||||||||||
Geography
| Country: | Japan |
| Coordinates: | 42.7° North, 142.2° East (view map) |
| Paleocoordinates: | 50.3° North, 128.2° East (Wright 2013) |
| Basis of coordinate: | stated in text |
| Geographic resolution: | outcrop |
Time
| Period: | Cretaceous | Epoch: | Late Cretaceous |
| Stage: | Maastrichtian | 10 m.y. bin: | Cretaceous 8 |
| Key time interval: | Early Maastrichtian | Ammonoid zone: | Nostoceras hetonaiense |
| Age range of interval: | 72.2 - 66 m.y. ago |
Stratigraphy
| Formation: | Hakobuchi |
| Stratigraphic resolution: | bed |
Lithology and environment
| Primary lithology: | lithified sandy mudstone |
| Environment: | marine indet. |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils |
Collection methods and comments
| Reason for describing collection: | taxonomic analysis |
| Collection method comments: Repository: Hobetsu Museum, Mukawa, Hokkaido (formerly Mikasa City Museum, Mikasa, Hokkaido) | |
Metadata
| Database number: | 174606 | ||
| Authorizer: | M. Clapham | Enterer: | M. Clapham | Research group: | marine invertebrate |
| Created: | 2015-11-17 00:20:58 | Last modified: | 2025-02-22 15:12:02 |
| Access level: | the public | Released: | 2015-11-17 00:20:58 |
| Creative Commons license: | CC0 |
Reference information
Primary reference:
| 56995. | Y. Shigeta and T. Nishimura. 2013. A new species of Gaudryceras (Ammonoidea, Gaudryceratidae) from the lowest Maastrichtian of Hokkaido, Japan and its biostratigraphic implications. Paleontological Research 17:47-57 [M. Clapham/M. Clapham] |