Locality 2, Nogi-Fukutomi: Serravallian, Japan
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Cephalopoda
- Octopoda
- Argonautidae
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| see common names | |||||||
Geography
| Country: | Japan |
| Coordinates: | 35.4° North, 133.0° East (view map) |
| Paleocoordinates: | 35.0° North, 130.8° East (Wright 2013) |
| Basis of coordinate: | estimated from map |
| Geographic resolution: | small collection |
Time
| Period: | Neogene | Epoch: | Miocene |
| Stage: | Serravallian | 10 m.y. bin: | Cenozoic 5 |
| Key time interval: | Serravallian | ||
| Age range of interval: | 13.82 - 11.63 m.y. ago |
Stratigraphy
| Formation: | Fujina | ||||
| Stratigraphic resolution: | group of beds | ||||
| Stratigraphy comments: Based on planktonic foraminifera, the upper member of the Fujina (=Huzina) Formation is assigned to N10-11 of Blow's zones (14.6/14.8-12.4 Ma) (Nomura & Maiya, 1984). Age constrained to N11 planktonic foraminifera zone by Yanagisawa (1990). Base of overlying Matsue Formation dated around 11.5-11.9 Ma by Shikano & Nagano (1985). | |||||
Lithology and environment
| Primary lithology: | lithified siltstone |
| Environment: | submarine fan |
| Geology comments: The nearly-exclusively siltstone lithology (with very occasional thin fine sandstone beds) suggests an environment no shallower than offshore. The lower Fujina was described as outer neritic on the basis of benthic foraminifera by Tai (1955), but those units are typically glauconitic sandstones. The upper Fujina may also be offshore, but an upper slope environment is perhaps more likely. The ostracod assemblages from the upper lower member to the upper member are similar to modern assemblages from upper slope environments in the Sea of Japan (Tanaka et al., 2002). | |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils |
Collection methods and comments
| Reason for describing collection: | taxonomic analysis |
| Collection method comments: Repository: Department of Geoscience, Shimane University, Matsue | |
Metadata
| Database number: | 167937 | ||
| Authorizer: | M. Clapham | Enterer: | M. Clapham |
| Modifier: | M. Clapham | Research group: | marine invertebrate |
| Created: | 2015-04-08 23:39:25 | Last modified: | 2025-02-22 15:12:02 |
| Access level: | the public | Released: | 2015-04-08 23:39:25 |
| Creative Commons license: | CC0 |
Reference information
Primary reference:
| 54940. | T. Sakumoto, K. Seto, and K. Takayasu. 1996. Fossil cephalopods from the Middle Miocene Fujina Formation of southwest Japan and its paleoenvironmental significance. Earth Science (Chikyu Kagaku) 50:408-413 [M. Clapham/M. Clapham] |