Kitakanegasawa Locality 2: Late/Upper Pliocene, Japan
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Gastropoda
- Naticidae
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Naticidae indet.
Guilding 1834
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1 specimen | ||||||
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Bivalvia
- Arcida
- Glycymerididae
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Glycymeris (Tucetilla) pilsbryi
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2 specimens | ||||||
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Glycymeris (Glycymeris) nipponica
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1 specimen | ||||||
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Bivalvia
- Arcida
- Cucullaeidae
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Arca boucardi
Jousseaume 1894
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4 specimens | ||||||
| recombined as Tetrarca boucardi | |||||||
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Bivalvia
- Arcida
- Limopsidae
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Limopsis oblonga
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2 specimens | ||||||
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Limopsis sp.
Sassi 1827
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2 specimens | ||||||
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Bivalvia
- Carditida
- Carditidae
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? Megacardita sp.
Sacco 1899
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1 specimen | ||||||
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Bivalvia
- Carditida
- Astartidae
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Astarte hakodatensis
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1 specimen | ||||||
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Tridonta alaskensis
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2 specimens | ||||||
| spelled with current rank as Astarte (Tridonta) | |||||||
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Bivalvia
- Lucinida
- Lucinidae
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? Lucinoma sp.
Dall 1901
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1 specimen | ||||||
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Bivalvia
- Cardiida
- Cardiidae
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? Clinocardium sp.
Keen 1936
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1 specimen | ||||||
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Profulvia kurodai
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1 specimen | ||||||
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Bivalvia
- Nuculida
- Nuculidae
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? Acila sp.
Adams and Adams 1858
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1 specimen | ||||||
| see common names | |||||||
Geography
| Country: | Japan | State/province: | Aomori |
| Coordinates: | 40.7° North, 140.1° East (view map) | ||
| Paleocoordinates: | 41.3° North, 139.5° East | ||
| Basis of coordinate: | stated in text | ||
| Geographic resolution: | hand sample |
Time
| Period: | Neogene | Epoch: | Pliocene |
| Stage: | Piacenzian | 10 m.y. bin: | Cenozoic 6 |
| Key time interval: | Late/Upper Pliocene | ||
| Age range of interval: | 3.60000 - 2.58000 m.y. ago |
Stratigraphy
| Stratigraphy comments: Based on the planktonic foraminifers and diatoms, the age of the formation is late Pliocene (Hirayama and Uemura, 1985; Nemoto and Wakabayashi, 1995) |
Lithology and environment
| Primary lithology: | sandstone |
| Includes fossils? | Y |
| Lithology description: shell-bearing medium grained sandstone (1 m thick), intercalated with claystone and siltstone | |
| Environment: | marine indet. |
| Geology comments: Based on cluster analysis of benthic foraminifers, Nemoto and Wakabayashi (1995) estimated that the formation was deposited in the upper bathyal zone | |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils,mesofossils |
Collection methods and comments
| Collection methods: | field collection |
| Reason for describing collection: | general faunal/floral analysis |
Metadata
| Database number: | 234748 | ||
| Authorizer: | P. Holroyd | Enterer: | P. Holroyd | Research group: | marine invertebrate |
| Created: | 2024-05-12 17:26:59 | Last modified: | 2024-05-12 17:26:59 |
| Access level: | the public | Released: | 2024-05-12 17:26:59 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 88404. | K. Amano. 2020. Molluscan fossils from the Kitakanegasawa Formation in Aomori Prefecture, Japan, with remarks on the northern limit of the Tsushima Warm Current during the late Pliocene. Bulletin of the National Museum of Natural Sciences, Series C 46:87-98 [P. Holroyd/P. Holroyd] |