Hikagenosawa Fm. of Southern Oyubari (Y070129): Early Cenomanian, Japan
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Cephalopoda
- Ammonitida
- Tetragonitidae
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Zelandites inflatus
Matsumoto 1959
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Rare category | |||||||||
| 1-2 specimens | ||||||||||
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Cephalopoda
- Ammonitida
- Turrilitidae
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Mariella dorsetensis
(Spath 1926)
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Rare category | |||||||||
| 1-2 specimens | ||||||||||
| see common names | ||||||||||
Geography
| Country: | Japan | State/province: | Hokkaido |
| Coordinates: | 44.0° North, 143.0° East (view map) | ||
| Paleocoordinates: | 39.7° North, 165.4° East (Wright 2013) | ||
| Basis of coordinate: | based on political unit | ||
| Geographic resolution: | basin |
Time
| Period: | Cretaceous | Epoch: | Late Cretaceous |
| Stage: | Cenomanian | 10 m.y. bin: | Cretaceous 5 |
| Key time interval: | Early Cenomanian | ||
| Age range of interval: | 100.5 - 93.9 m.y. ago |
Stratigraphy
| Geological group: | Yezo | Formation: | Hikagenosawa | Member: | M7 |
| Stratigraphic resolution: | member | ||||
| Stratigraphy comments: syn: Hikagenosawa shale | |||||
Lithology and environment
| Primary lithology: | planar lamination lithified mudstone |
| Secondary lithology: | tuff |
| Includes fossils? | Y |
| Lithology description: M7: laminated mudstone with acidic tuff intercalations | |
| Environment: | offshore |
| Geology comments: Appears to be a deep water facies, but near enough to shore to have tuffs. Collection consist of inoceramids and ammonites, regarded as deep-water faunas. | |
Taphonomy
Collection methods and comments
| Reason for describing collection: | biostratigraphic analysis |
| Taxonomic list comments:Biostratigraphic topic of the paper might preclude mention of taxa other than inoceramids and ammonites | |
Metadata
| Database number: | 62181 | ||
| Authorizer: | A. Miller | Enterer: | C. Ferguson |
| Modifier: | A. Hendy | Research group: | marine invertebrate |
| Created: | 2006-07-13 12:27:43 | Last modified: | 2025-02-22 15:12:02 |
| Access level: | the public | Released: | 2006-07-13 12:27:43 |
| Creative Commons license: | CC0 |
Reference information
Primary reference:
| 15357. | F. Kawabe. 2000. Cretaceous Stratigraphy in the Oyubari Area, Central Hokkaido, Japan. Bulletin of the National Science Museum. Series C: Geology and Paleontology 26(1-2):9-56 [A. Miller/C. Ferguson] |