Sirahama, Kamo-gun, Izu Province: Piacenzian, Japan
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Rhynchonellata
- Terebratulida
- Frenulinidae
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Jolonica (Kamoica) iduensis n. sp.
Hatai 1936
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see common names |
Geography
Country: | Japan |
Coordinates: | 34.7° North, 139.0° East (view map) |
Paleocoordinates: | 35.2° North, 138.4° East |
Basis of coordinate: | based on nearby landmark |
Geographic resolution: | outcrop |
Time
Period: | Neogene | Epoch: | Pliocene |
Stage: | Piacenzian | 10 m.y. bin: | Cenozoic 6 |
Key time interval: | Piacenzian | ||
Age range of interval: | 3.60000 - 2.58000 m.y. ago |
Stratigraphy
Geological group: | Shirahama | Formation: | Harada | ||
Stratigraphic resolution: | group of beds | ||||
Stratigraphy comments: The nannofossil assemblage from the Harada Formation in the upper part of this group is characterized by the occurrence of Pseudoemiliania cf. lacunosa, without Reticulofenestra pseudoumbilica and Gephyrocapsa spp. (Okada, 1987). According to Blow (1969) and Okada and Bukry (1980), this group belongs to zones N19 and CN12 (early Piacenzian), according to Akimoto et al. (2012). Utagawa et al. (2015) dated andesite in the underlying Suzaki Formation at 3.62 +/- 0.16 Ma by K-Ar. |
Lithology and environment
Primary lithology: | "cross stratification",tuffaceous poorly lithified calcareous sandstone |
Environment: | carbonate indet. |
Taphonomy
Modes of preservation: | body |
Size of fossils: | macrofossils |
Collection methods and comments
Reason for describing collection: | taxonomic analysis |
Metadata
Database number: | 190823 | ||
Authorizer: | M. Clapham | Enterer: | M. Clapham |
Modifier: | M. Clapham | Research group: | marine invertebrate |
Created: | 2017-12-18 23:01:54 | Last modified: | 2017-12-18 23:25:34 |
Access level: | the public | Released: | 2017-12-18 23:01:54 |
Creative Commons license: | CC BY |
Reference information
Primary reference:
64049. | K. M. Hatai. 1940. The Cenozoic Brachiopoda of Japan. Science Reports, Tohoku Imperial University, Series 2 20:1-413 [M. Clapham/M. Clapham] |