Ashizawa area, locality 5: Early Coniacian, Japan
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
|
Cephalopoda
- Ammonitida
- Desmoceratidae
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| (1 measurement) | ||||||||||
| see common names | ||||||||||
Geography
| Country: | Japan | State/province: | Fukushima |
| Coordinates: | 37.2° North, 140.9° East (view map) | ||
| Paleocoordinates: | 45.2° North, 141.0° East (Wright 2013) | ||
| Basis of coordinate: | estimated from map | ||
| Geographic resolution: | small collection |
Time
| Period: | Cretaceous | Epoch: | Late Cretaceous |
| Stage: | Coniacian | 10 m.y. bin: | Cretaceous 6 |
| Key time interval: | Early Coniacian | ||
| Age range of interval: | 89.8 - 85.7 m.y. ago |
Stratigraphy
Lithology and environment
| Primary lithology: | lithified sandstone |
| Secondary lithology: | lithified sandy siltstone |
| Lithology description: two levels of muddy fine-grained sandstone or sandy siltstone | |
| Environment: | coastal indet. |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils |
Collection methods and comments
| Collection methods: | field collection |
| Reason for describing collection: | taxonomic analysis |
Metadata
| Database number: | 157765 | ||
| Authorizer: | M. Clapham | Enterer: | M. Clapham |
| Modifier: | M. Carrano | Research group: | marine invertebrate |
| Created: | 2014-07-02 21:20:52 | Last modified: | 2025-02-22 15:12:02 |
| Access level: | the public | Released: | 2014-07-02 21:20:52 |
| Creative Commons license: | CC0 |
Reference information
Primary reference:
| 24671. | 1% 5880 | T. Matsumoto, M. Nemoto, and C. Suzuki. 1990. Gigantic ammonites from the Cretaceous Futaba Group of Fukushima Prefecture. Transactions and Proceedings of the Paleontological Society of Japan, N.S. 157:366-381 [W. Kiessling/U. Merkel] |