Loc. 4 [Ishiizawa Fm]: Middle Miocene, Japan
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
|
Bivalvia
- Solenida
- Solenidae
|
|||||||
|
Solen sp.
Linnaeus 1758
|
4 individuals | ||||||
|
Bivalvia
- Hiatellida
- Hiatellidae
|
|||||||
|
Panope japonica
|
1 individual | ||||||
| corrected as Panopea | |||||||
|
Bivalvia
- Cardiida
- Cardiidae
|
|||||||
|
Clinocardium sp.
Keen 1936
|
1 individual | ||||||
|
Bivalvia
- Cardiida
- Veneridae
|
|||||||
|
Dosinia (Phacosoma) cf. owadaensis
|
8 individuals | ||||||
|
Mercenaria sp.
Schumacher 1817
|
14 individuals | ||||||
|
Bivalvia
- Cardiida
- Mactridae
|
|||||||
|
Spisula sp.
Gray 1837
|
4 individuals | ||||||
|
Bivalvia
- Arcida
- Glycymerididae
|
|||||||
|
Glycymeris (Glycymeris) idensis
(Kanno 1956)
|
249 individuals | ||||||
| original and current combination Glycymeris idensis | |||||||
|
Gastropoda
- Naticidae
|
|||||||
|
Cryptonatica sp.
Dall 1892
|
2 individuals | ||||||
|
Gastropoda
- Neotaenioglossa
- Calyptraeidae
|
|||||||
|
Crepidula sp.
Lamarck 1799
|
1 individual | ||||||
|
Gastropoda
- Solariellidae
|
|||||||
|
? Minolia sp.
Adams 1860
|
1 individual | ||||||
| see common names | |||||||
Geography
| Country: | Japan |
| Coordinates: | 42.8° North, 143.8° East (view map) |
| Paleocoordinates: | 43.4° North, 142.2° East |
| Basis of coordinate: | estimated from map |
| Geographic resolution: | small collection |
Time
| Period: | Neogene | Epoch: | Miocene |
| 10 m.y. bin: | Cenozoic 5 | ||
| Key time interval: | Middle Miocene | ||
| Age range of interval: | 15.98000 - 11.63000 m.y. ago |
Stratigraphy
| Formation: | Ishiizawa | ||||
| Stratigraphic resolution: | formation | ||||
| Stratigraphy comments: STRATIGRAPHIC RELATIONS: From Ishiizawa Fm, which unconformably overlies the Tokomuro Fm (Middle Miocene). AGE: Middle Miocene on the basis of molluscan biostratigraphy. Approximately correlated with the lower part of the Togeshita Formation. STRATIGRAPHIC POSITION: From unknown position in regional section. | |||||
Lithology and environment
| Primary lithology: | poorly lithified "siliciclastic" |
| Includes fossils? | Y |
| Lithology description: SPECIFIC LITHOLOGY: Unknown, but certainly siliciclastic. LITHIFICATION: Poorly-lithifed on the basis of figured specimens. | |
| Environment: | coastal indet. |
| Geology comments: ENVIRONMENT: Coastal marine, siliciclastic environment. | |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils |
| Preservation of anatomical detail: | medium |
Collection methods and comments
| Collection methods: | field collection |
| Reason for describing collection: | paleoecologic analysis |
| Collection method comments: COLLECTOR: Presumably K. Amano (c. 1980's). REPOSITORY: Joetsu University of Education, Japan (JUE) | |
| Taxonomic list comments:COVERAGE: Exhaustive for gastropoda, bivalvia and scaphopoda. NOMENCLATURE: Authoritative publication, using moderately recent nomenclature, subgenus and species level designations. | |
Metadata
| Database number: | 81703 | ||
| Authorizer: | A. Hendy | Enterer: | A. Hendy | Research group: | marine invertebrate |
| Created: | 2008-07-11 20:21:53 | Last modified: | 2013-11-25 13:37:23 |
| Access level: | authorizer only | Released: | 2009-07-11 20:21:52 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 27590. | K. Amano. 1986. Age and characteristics of the so-called "Atsunai-Togeshita fauna" in Hokkaido. Paleontological Society of Japan Special Papers 29:187-198 [A. Hendy/A. Hendy] |