Asagai FM, Oligocene, Iwaki, Fukushima, Japan: Oligocene, Japan
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Gastropoda
- Lepetellida
- Fissurellidae
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Diodora sp.
Gray 1821
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Bivalvia
- Cardiida
- Cardiidae
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Clinocardium asagaiense
(Makiyama 1934)
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| recombined as Ciliatocardium asagaiense | ||||||||||
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Clinocardium sp.
Keen 1936
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Clinocardium decoratum
(Grewingk 1850)
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| synonym of Clinocardium (Clinocardium) nuttallii | ||||||||||
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Bivalvia
- Pholadida
- Myidae
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Mya cf. grewingki
(Makiyama 1934)
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| original and current combination Mya (Arenomya) grewingki | ||||||||||
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Bivalvia
- Thraciida
- Thraciidae
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Thracia sp.
Blainville 1824
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Bivalvia
- Arcida
- Arcidae
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Anadara chichibuensis
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Reptilia
- Theropoda
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Aves indet.
Linnaeus 1758
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Hasegawa 1977 | |||||||||
| Pelecaniformes? | ||||||||||
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Ophiuroidea
- Amphilepidida
- Amphiuridae
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Amphioplus uchigoensis n. sp.
Ishida 1992
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2 specimens | |||||||||
| see common names | ||||||||||
Geography
| Country: | Japan | State/province: | Fukushima | County: | Iwaki |
| Coordinates: | 37.1° North, 140.9° East (view map) | ||||
| Paleocoordinates: | 43.7° North, 137.6° East | ||||
| Basis of coordinate: | based on nearby landmark |
Time
| Period: | Paleogene | Epoch: | Oligocene |
| 10 m.y. bin: | Cenozoic 4 | ||
| *Period: | Early/Lower Tertiary - Early/Lower Tertiary | *Epoch: | Oligocene - Oligocene |
| Key time interval: | Oligocene | ||
| Age range of interval: | 33.90000 - 23.03000 m.y. ago | ||
| * legacy (obsolete) database fields | |||
Lithology and environment
| Primary lithology: | poorly lithified sandstone | ||
| Secondary lithology: | poorly lithified sandy mudstone | ||
| Includes fossils? | Y | ||
| Environment: | offshore | Tectonic setting: | forearc basin |
Taphonomy
| Modes of preservation: | body,cast |
| Articulated whole bodies: | some |
Collection methods and comments
| Reason for describing collection: | taxonomic analysis |
Metadata
| Database number: | 32038 | ||
| Authorizer: | L. Villier, M. Uhen | Enterer: | L. Villier, M. Uhen |
| Modifier: | L. Villier | Research group: | marine invertebrate |
| Created: | 2003-06-02 06:02:02 | Last modified: | 2006-02-01 07:33:01 |
| Access level: | the public | Released: | 2003-06-02 06:02:02 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 8604. | Y. Ishida. 1992. Fossil ophiuroids from the Oligocene Asagai Formation of Iwaki, Fukushima, Japan. Bulletin of the National Science Museum C18(2):65-78 [L. Villier/L. Villier/L. Villier] |
Secondary references:
| 40950 | Y. Hasegawa. 1977. Early Neogene birds form Honshu and Kyushu, Japan. Proceedings of the first International Congress on Pacific Neogene Stratigraphy, Tokyo 340-341 [M. Uhen/M. Uhen/M. Uhen] |