Shiroi, Ueno-mura, Shiroi Formation, Gunma: Hauterivian, Japan
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Bivalvia
- Pholadida
- Corbulidae
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Bivalvia
- Venerida
- Neomiodontidae
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unclassified
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| see common names | |||||||
Geography
| Country: | Japan |
| Coordinates: | 36.1° North, 138.8° East (view map) |
| Paleocoordinates: | 47.3° North, 145.0° East (Wright 2013) |
| Basis of coordinate: | based on nearby landmark |
| Geographic resolution: | outcrop |
Time
| Period: | Cretaceous | Epoch: | Early Cretaceous |
| Stage: | Hauterivian | 10 m.y. bin: | Cretaceous 2 |
| Key time interval: | Hauterivian | ||
| Age range of interval: | 132.6 - 125.77 m.y. ago |
Stratigraphy
| Formation: | Shiroi | ||||
| Stratigraphic resolution: | group of beds | ||||
| Stratigraphy comments: upper part of the formation | |||||
Lithology and environment
| Primary lithology: | lithified "shale" |
| Secondary lithology: | lithified sandstone |
| Lithology description: dark-gray shale and fine-grained sandstone | |
| Environment: | estuary/bay |
| Geology comments: brackish-water environment | |
Taphonomy
| Size of fossils: | macrofossils |
Collection methods and comments
| Collection methods: | field collection |
| Reason for describing collection: | taxonomic analysis |
Metadata
| Database number: | 67144 | ||
| Authorizer: | W. Kiessling | Enterer: | U. Merkel | Research group: | marine invertebrate |
| Created: | 2006-11-10 02:55:44 | Last modified: | 2025-02-22 15:12:02 |
| Access level: | the public | Released: | 2006-11-10 02:55:41 |
| Creative Commons license: | CC0 |
Reference information
Primary reference:
| 19151. | T. Kozai. 1986. Early Cretaceous Pulsidis (Bivalvia) from Japan. Transactions and Proceedings of the Palaeontological Society of Japan 144:479-489 [W. Kiessling/U. Merkel] |