Akaushi, Motoyoshi-cho (Subcolumbites zone): Spathian, Japan
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
|
Cephalopoda
- Ceratitida
- Hellenitidae
|
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= Hellenites tchernyschewiensis
Zakharov 1968
|
Shigeta 2022 | ||||||
| see common names | |||||||
Geography
| Country: | Japan |
| Coordinates: | 38.8° North, 141.5° East (view map) |
| Paleocoordinates: | 4.9° North, 138.8° East (Wright 2013) |
| Basis of coordinate: | based on nearby landmark |
| Geographic resolution: | outcrop |
Time
| Period: | Triassic | Epoch: | Early Triassic |
| Stage: | Olenekian | 10 m.y. bin: | Triassic 1 |
| Key time interval: | Spathian | ||
| Age range of interval: | 248.6 - 247 m.y. ago |
Stratigraphy
| Formation: | Osawa | ||||
| Stratigraphic resolution: | group of beds | ||||
| Stratigraphy comments: Subcolumbites perrinismithi zone | |||||
Lithology and environment
| Primary lithology: | lithified "siliciclastic" |
| Environment: | marine indet. |
Taphonomy
| Modes of preservation: | mold/impression |
| Size of fossils: | macrofossils |
Collection methods and comments
| Collection methods: | field collection |
| Reason for describing collection: | taxonomic analysis |
| Collection method comments: Repository: Department of Geology, Kaguwa University | |
Metadata
| Database number: | 186962 | ||
| Authorizer: | M. Clapham | Enterer: | M. Clapham | Research group: | marine invertebrate |
| Created: | 2017-07-08 11:34:00 | Last modified: | 2025-02-22 15:12:02 |
| Access level: | the public | Released: | 2017-07-08 11:34:00 |
| Creative Commons license: | CC0 |
Reference information
Primary reference:
| 33127. | Y. Bando and S. Shimoyama. 1974. Late Scythian ammonoids from the Kitakami Massif. Transactions and Proceedings of the Paleontological Society of Japan, N.S. 94:293-312 [M. Clapham/M. Clapham] |
Secondary references:
| 82377 | Y. Shigeta. 2022. Revision of early Spathian (late Olenekian, Early Triassic) ammonoids from the Osawa Formation at Akaushi in the Motoyoshi area, South Kitakami Belt, Northeast Japan. Paleontological Research 26:405-419 [M. Clapham/M. Clapham] |