Higashi-Tanakura Group Kubota Fm Molluscan Fauna Locality 7: Late/Upper Miocene, Japan
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Gastropoda
- Neotaenioglossa
- Calyptraeidae
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Crepidula sp.
Lamarck 1799
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Gastropoda
- Cerithiidae
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Cerithium kobelti
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Gastropoda
- Turritellidae
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Turritella tanaguraensis
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Gastropoda
- Naticidae
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Sinum yabei
Otuka 1934
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| synonym of Sinum ineptum | ||||||||||
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Neverita kiritaniana
(Yokoyama 1931)
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| synonym of Glossaulax didyma | ||||||||||
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Gastropoda
- Neogastropoda
- Cancellariidae
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Cancellaria hukusimana
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Gastropoda
- Neogastropoda
- Buccinidae
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Siphonalia cf. spadicea
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Phos iwakianus
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Gastropoda
- Neogastropoda
- Nassariidae
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Nassarius acutidentatus
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Bivalvia
- Cardiida
- Ungulinidae
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Felaniella usta
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| synonym of Diplodonta | ||||||||||
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Bivalvia
- Cardiida
- Veneridae
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Mercenaria chitaniana
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Protothaca tateiwai
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| synonym of Leukoma | ||||||||||
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Dosinia kaneharai
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Dosinia japonica
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Bivalvia
- Cardiida
- Tellinidae
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Macoma incongrua
(Martens 1865)
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| recombined as Macoma (Macoma) incongrua | ||||||||||
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Bivalvia
- Cardiida
- Cardiidae
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Laevicardium shiobarense
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Bivalvia
- Lucinida
- Lucinidae
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Lucinoma annulata
(Reeve 1850)
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| recombined as Lucinoma annulatum | ||||||||||
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Bivalvia
- Pectinida
- Anomiidae
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Anomia cytaeum
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Bivalvia
- Ostreida
- Ostreidae
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Ostrea gravitesta
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Bivalvia
- Arcida
- Arcidae
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Anadara ninohensis
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| Dominant species at locality | ||||||||||
| see common names | ||||||||||
Geography
| Country: | Japan |
| Coordinates: | 37.5° North, 140.0° East (view map) |
| Paleocoordinates: | 38.9° North, 138.4° East |
| Basis of coordinate: | based on political unit |
| Geographic resolution: | local area |
Time
| Period: | Neogene | Epoch: | Miocene |
| 10 m.y. bin: | Cenozoic 6 | ||
| Key time interval: | Late/Upper Miocene | ||
| Age range of interval: | 11.63000 - 5.33300 m.y. ago |
Stratigraphy
| Geological group: | Higashi-Tanakura | Formation: | Kubota | ||
| Stratigraphic resolution: | formation | ||||
| Stratigraphy comments: Higbashi-Tanajura group is a marine representative of the regressive Genjigawa stage | |||||
Lithology and environment
| Primary lithology: | medium,micaceous,gray,blue lithified argillaceous sandstone |
| Secondary lithology: | fine,micaceous,black,blue lithified argillaceous sandstone |
| Includes fossils? | Y |
| Includes fossils? | Y |
| Lithology description: massive medium sandstone in the lower part and massive fine sandstone with intercalations of several ash tuff layers in the central and upper part of the basin...characterized by abundant occurrence of molluscan fossils. Bluish-gray medium to fine sandstone covers (beds below) and consists mainly of quartz and mica grains with argillaceous materials. It is fine in the west, and becomes coarser eastward...The medium sandstone is covered by massive fine sandstone in the southern area. This fine sandstone is bluish-black colored, massive, homogeneous, argillaceous and rich in mica flakes. Several white fine ash tuff layers are intercalated in the middle part of the fine sandstone. They are concentrated in three restricted horizons. Coarse sandstone lenses, rich in shell fragments and quartz grains are found at Okada. They are more than 10m in thickness and are contemporaneous with the fine sandstone and diminish laterally into the fine sandstone. | |
| Environment: | marginal marine indet. |
| Geology comments: Lateral and vertical changes of lithofacies indicate that the group had been accumulated in the course of a local transgression and regression. Sediment is supplied from Abukuma mountain block. Paleogeographically, Higashi-Tanakura group is the deposits filling up a small shallow embayment open to the north. | |
Taphonomy
| Modes of preservation: | body |
Collection methods and comments
| Reason for describing collection: | paleoecologic analysis |
Metadata
| Also known as: | Locality 7 | ||
| Database number: | 52112 | ||
| Authorizer: | A. Miller | Enterer: | K. Bulinski |
| Modifier: | K. Bulinski | Research group: | marine invertebrate |
| Created: | 2005-07-25 13:20:30 | Last modified: | 2005-08-01 11:58:34 |
| Access level: | the public | Released: | 2005-07-25 13:20:30 |
| Creative Commons license: | CC BY | ||
Reference information
Primary reference:
| 13978. | Y. Iwasaki. 1970. The Shiobara-type Molluscan Fauna: An ecological analysis of fossil molluscs. Journal of the faculty of science, University of Tokyo, Section 2 17(3):351-444 [A. Miller/K. Bulinski/K. Bulinski] |