Omagari, Abeshinai River, near mouth of Osoushinai River [Omagari Fm]: Campanian, Japan
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
|
Rhynchonellata
- Terebratulida
- Chlidonophoridae
|
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| 21 specimens | ||||||||||
| (9 measurements) | ||||||||||
| see common names | ||||||||||
Geography
| Country: | Japan |
| Coordinates: | 44.8° North, 142.1° East (view map) |
| Paleocoordinates: | 52.8° North, 130.6° East (Wright 2013) |
| Basis of coordinate: | based on nearby landmark |
| Geographic resolution: | outcrop |
Time
| Period: | Cretaceous | Epoch: | Late Cretaceous |
| Stage: | Campanian | 10 m.y. bin: | Cretaceous 7 |
| Key time interval: | Campanian | ||
| Age range of interval: | 83.6 - 72.2 m.y. ago |
Stratigraphy
| Formation: | Omagari | ||||
| Stratigraphic resolution: | bed | ||||
| Stratigraphy comments: STRATIGRAPHIC RELATIONS: From the Omagari Fm, which regionally overlies the Nishichirashinai Fm (Coniacian-Santonian) and is overlain by the Osoushinai Fm (Campanian). AGE: Campanian, for which biostratigraphic justification is not stated. STRATIGRAPHIC POSITION: From facies brecciated at this locality. | |||||
Lithology and environment
| Primary lithology: | poorly lithified muddy,silty breccia |
| Includes fossils? | Y |
| Lithology description: SPECIFIC LITHOLOGY: Weakly consolidated mudstone and siltstone clasts of the brecciated facies. LITHIFICATION: Poorly lithified, on the basis of facies description. | |
| Environment: | deep-water indet. |
| Geology comments: ENVIRONMENT: Hydrocarbon seep. | |
Taphonomy
| Modes of preservation: | body,original calcite |
| Size of fossils: | mesofossils |
| Preservation of anatomical detail: | good |
| Temporal resolution: | time-averaged |
| Spatial resolution: | parautochthonous |
Collection methods and comments
| Collection methods: | bulk,sieve,field collection |
| Minimum sieve size: | 0.500 |
| Collection size: | 21 specimens |
| Reason for describing collection: | taxonomic analysis |
| Collection method comments: COLLECTOR: Not stated in text, but presumably includes Y. Hikida. REPOSITORY: University Museum, University of Tokyo (NMUT). | |
| Taxonomic list comments:COVERAGE: Limited to brachiopods mentioned in text. Other co-occuring taxa are not reported in text. These may include bivalves (Kiel et al. 2008) and gastropods (Kaim et al. (2009), and a general discussion of the fauna is found in Hikida et al. (2003). | |
Metadata
| Database number: | 95697 | ||
| Authorizer: | A. Hendy | Enterer: | A. Hendy |
| Modifier: | A. Hendy | Research group: | marine invertebrate |
| Created: | 2010-04-24 07:38:39 | Last modified: | 2025-02-22 15:12:02 |
| Access level: | the public | Released: | 2010-04-24 07:38:39 |
| Creative Commons license: | CC0 |
Reference information
Primary reference:
| 32508. | A. Kaim, A. Bitner, and R. G. Y. Jenkins Hikida. 2010. A monospecific assemblage of terebratulide brachiopods in the Upper Cretaceous seep deposits of Omagari, Hokkaido, Japan. Acta Palaeontologica Polonica 55(1):73-84 [A. Hendy/A. Hendy] |