Kamicharo Fm - KC-7: Early/Lower Miocene, Japan
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Bivalvia
- Carditida
- Carditidae
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Cyclocardia sp.
Conrad 1867
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Gastropoda
- Turritellidae
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Turritella sp.
Lamarck 1799
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see common names |
Geography
Country: | Japan |
Coordinates: | 43.1° North, 143.8° East (view map) |
Paleocoordinates: | 43.9° North, 142.0° East |
Basis of coordinate: | estimated from map |
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: | Kamicharo | ||||
Stratigraphic resolution: | bed | ||||
Stratigraphy comments: STRATIGRAPHIC RELATIONS: From Kamicharo Fm, which overlies the Nuibetsu Fm (Oligocene) of the Ombetsu Gp, and is overlain by the Atsunai Fm of the Atsunai Gp; correlative unit of the Tokomuro Fm. 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: | biostratigraphic 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: | 70395 | ||
Authorizer: | A. Hendy | Enterer: | A. Hendy | Research group: | marine invertebrate |
Created: | 2007-03-21 21:45:52 | Last modified: | 2013-11-25 13:37:23 |
Access level: | authorizer only | Released: | 2007-03-21 21:45:51 |
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] |