Tokmuro Fm - TM-1: Early/Lower Miocene, Japan
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Gastropoda
- Naticidae
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Tectonatica janthostomoides
Kuroda and Habe 1949
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| synonym of Cryptonatica andoi | |||||||
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Gastropoda
- Turritellidae
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Turritella sp.
Lamarck 1799
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Mesalia sp.
Gray 1847
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Bivalvia
- Cardiida
- Veneridae
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Ezocallista sp.
Kamada 1962
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Bivalvia
- Cardiida
- Cardiidae
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Serripes sp.
Gould 1841
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Bivalvia
- Cardiida
- Tellinidae
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Macoma (Macoma) tokyoensis
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| see common names | |||||||
Geography
| Country: | Japan |
| Coordinates: | 42.9° North, 143.8° East (view map) |
| Paleocoordinates: | 43.7° North, 141.9° East |
| Geographic resolution: | outcrop |
Time
| Period: | Neogene | Epoch: | Miocene |
| 10 m.y. bin: | Cenozoic 5 | ||
| Key time interval: | Early/Lower Miocene | ||
| Age range of interval: | 23.03000 - 15.98000 m.y. ago |
Stratigraphy
| Formation: | Tokmuro | ||||
| Stratigraphic resolution: | bed | ||||
| Stratigraphy comments: STRATIGRAPHIC RELATIONS: From Tokomuro Fm, which overlies the Nuibetsu Fm (Oligocene) of the Ombetsu Gp, and is overlain by the Atsunai Fm of the Atsunai Gp. THICKNESS: From bed with formation that attains a thickness of 180 m. AGE: Early Miocene on the basis of molluscan biostratigraphy. STRATIGRAPHIC POSITION: Unknown position within formation. | |||||
Lithology and environment
| Primary lithology: | tuffaceous,gray lithified sandy siltstone |
| Includes fossils? | Y |
| Lithology description: SPECIFIC LITHOLOGY: Alternating beds of gray siltstone, sandstone, sandy tuff, and hard shale. LITHIFICATION: Lithified, on the basis of facies description. | |
| Environment: | offshore |
| Geology comments: ENVIRONMENT: Assemblage appears to be derived from an offshore shelf siliciclastic environment. TEMPERATURE: Stratigraphically adjacent pollen floras indicate a cool-temperate environment. | |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils |
Collection methods and comments
| Collection methods: | field collection |
| Reason for describing collection: | taxonomic analysis |
| Collection method comments: COLLECTOR: Y. Honda. REPOSITORY: Institute of Geology and Paleontology, Tohoku University, Sendai, Japan (IGPS). | |
| Taxonomic list comments:COVERAGE: Exhaustive for gastropoda and bivalvia. NOMENCLATURE: Authoritative publication with subgeneric and species-level assignments. | |
Metadata
| Database number: | 70380 | ||
| Authorizer: | A. Hendy | Enterer: | A. Hendy |
| Modifier: | A. Hendy | Research group: | marine invertebrate |
| Created: | 2007-03-21 19:00:10 | Last modified: | 2013-11-25 13:37:23 |
| Access level: | authorizer only | Released: | 2008-03-21 19:00:10 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 23610. | Y. Honda. 1988. Molluscan fossils from the Atsunai Group, Kushiro Coal Field, Eastern Hokkaido, Northern Japan. Sato Ho-on Kai Special Publication (Profesoor T. Kotaka Commemorartive Volume) 351-363 [A. Hendy/A. Hendy] |