Sn0001 - Sanchu area [Shiroi Fm]: Berriasian - Valanginian, Japan
collected by Matsukawa & Kase
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
|
Bivalvia
- Cardiida
- Cardiidae
|
|||||||
|
Gastropoda
- Cassiopidae
|
|||||||
| see common names | |||||||
Geography
| Country: | Japan |
| Coordinates: | 36.1° North, 138.7° East (view map) |
| Paleocoordinates: | 51.9° North, 144.0° East (Wright 2013) |
| Basis of coordinate: | based on nearby landmark |
| Geographic resolution: | outcrop |
Time
| Period: | Cretaceous | Epoch: | Early Cretaceous |
| Stage: | Berriasian - Valanginian | 10 m.y. bin: | Cretaceous 1 |
| Key time interval: | Berriasian - Valanginian | ||
| Age range of interval: | 143.1 - 132.6 m.y. ago |
Stratigraphy
| Formation: | Shiroi | ||||
| Stratigraphic resolution: | bed | ||||
| Stratigraphy comments: STRATIGRAPHIC RELATIONS: From the Shiroi Fm. AGE: Lower Neocomian; justification for age not reported in text; assigned to Valanginian-Berriasian by enterer. STRATIGRAPHIC POSITION: From the middle part of the Shiroi Fm. | |||||
Lithology and environment
| Primary lithology: | black lithified "shale" |
| Includes fossils? | Y |
| Lithology description: SPECIFIC LITHOLOGY: Black shale. LITHIFICATION: Lithified, on the basis of figured specimens. | |
| Environment: | marine indet. |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils |
| Disassociated major elements: | many |
Collection methods and comments
| Collection methods: | field collection |
| Reason for describing collection: | taxonomic analysis |
| Collectors: | Matsukawa & Kase |
| Collection method comments: COLLECTOR: M. Matsukawa and T. Kase. REPOSITORY: Not stated in text. | |
| Taxonomic list comments:COVERAGE: Exhaustive for gastropods; other taxa (namely bivalves and foraminifera) often present. NOMENCLATURE: Authoritative publication, with relatively modern nomenclature, and species-resolution identifications. | |
Metadata
| Database number: | 91335 | ||
| Authorizer: | A. Hendy | Enterer: | A. Hendy |
| Modifier: | A. Hendy | Research group: | marine invertebrate |
| Created: | 2009-09-15 09:13:24 | Last modified: | 2025-02-22 15:12:02 |
| Access level: | the public | Released: | 2009-09-15 09:13:24 |
| Creative Commons license: | CC0 |
Reference information
Primary reference:
| 30704. | T. Kase. 1984. Early Cretaceous marine and brackish-water Gastropoda from Japan 1-262 [A. Hendy/A. Hendy] |