Loc. 4, Sannai River [Tentokuji Fm]: Pliocene, Japan
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Bivalvia
- Nuculanida
- Yoldiidae
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Yoldia (Cnesterium) cf. notabilis
(Yokoyama 1922)
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1 specimen | ||||||
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Bivalvia
- Nuculida
- Nuculidae
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Acila (Truncacila) nakazimai
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52 specimens | ||||||
| see common names | |||||||
Geography
| Country: | Japan |
| Coordinates: | 39.8° North, 140.4° East (view map) |
| Paleocoordinates: | 40.5° North, 139.6° East |
| Basis of coordinate: | based on nearby landmark |
| Geographic resolution: | outcrop |
Time
| Period: | Neogene | Epoch: | Pliocene |
| 10 m.y. bin: | Cenozoic 6 | ||
| Key time interval: | Pliocene | Nannofossil zone: | NN16 |
| Age range of interval: | 5.33300 - 2.58000 m.y. ago |
Stratigraphy
| Formation: | Tentokuji | ||||
| Stratigraphic resolution: | bed | ||||
| Stratigraphy comments: STRATIGRAPHIC RELATIONS: From the Akita Fm, which overlie the Funakawa Fm, and is overlain by the Sasaoka Fm. AGE: Middle Pliocene, on the basis of foraminiferal and calcareous nanofossil biostratigraphy. STRATIGRAPHIC POSITION: From the "upper" member of the formation, near the top of the section. | |||||
Lithology and environment
| Primary lithology: | poorly lithified siltstone |
| Secondary lithology: | medium poorly lithified sandstone |
| Includes fossils? | Y |
| Includes fossils? | Y |
| Lithology description: SPECIFIC LITHOLOGY: Siltstone dominated alternation of siltstone and medium-grained sandstone. LITHIFICATION: Poorly-lithified, based on figured specimens. | |
| Environment: | coastal indet. |
| Geology comments: ENVIRONMENT: Both cold- and warm-water species found. Shallow warm-water currents over the cold-water mass is suggested. | |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils |
Collection methods and comments
| Collection methods: | bulk,field collection |
| Reason for describing collection: | paleoecologic analysis |
| Collection method comments: COLLECTORS: Not stated in text, but presumably including K. Amano et al. REPOSITORY: Not stated in text. Possibly Joetsu University or Akita University. | |
| Taxonomic list comments:COVERAGE: Exhaustive of mollusca. NOMENCLATURE: Not an authoritative publication, but with modern nomenclature and species-resolution identifications. | |
Metadata
| Database number: | 97080 | ||
| Authorizer: | A. Hendy | Enterer: | A. Hendy |
| Modifier: | A. Hendy | Research group: | marine invertebrate |
| Created: | 2010-07-17 16:02:18 | Last modified: | 2013-11-25 13:37:23 |
| Access level: | the public | Released: | 2010-07-17 16:02:18 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 33142. | K. Amano, M. Suzuki, and T. Sato. 2000. Warm-water influx into Japan Sea in the middle Pliocene - Molluscan faunas from the Tentokuji FOrmation around Mt. Taihei in Akita Prefecture. Journal of the Geological Society of Japan 106(4):299-306 [A. Hendy/A. Hendy] |