Loc. M-39 - River Kajisako [Nagase Fm]: Cenomanian, Japan
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Cephalopoda
- Ammonitida
- Acanthoceratidae
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Calycoceras cf. orientale
Matsumoto et al. 1957
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Matsumoto 1982 | R category | ||||||||
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Bivalvia
- Arcida
- Glycymerididae
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Glycymeris (Pseudoveletuceta) mifunensis
Tashiro 1971
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C category | |||||||||
| (2 measurements) | ||||||||||
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Bivalvia
- Mytilida
- Mytilidae
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Septifer mifunensis
Tamura 1976
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A category | |||||||||
| (3 measurements) | ||||||||||
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Bivalvia
- Venerida
- Corbiculidae
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Veloritina cf. matsumotoi
Tamura 1977
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R category | |||||||||
| (1 measurement) | ||||||||||
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Bivalvia
- Venerida
- Mactridae
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Cymbophora okadakensis
Tamura 1977
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R category | |||||||||
| (1 measurement) | ||||||||||
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Bivalvia
- Trigoniida
- Pterotrigoniidae
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| R category | ||||||||||
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Bivalvia
- Trigoniida
- Megatrigoniidae
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Pseudotrigonia (Acanthotrigonia) higoensis
Tamura and Tashiro 1967
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R category | |||||||||
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Pseudotrigonia (Acanthotrigonia) mashikensis
Tamura and Tashiro 1967
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C category | |||||||||
| see common names | ||||||||||
Geography
| Country: | Japan | County: | Shikoku |
| Coordinates: | 33.8° North, 134.0° East (view map) | ||
| Paleocoordinates: | 39.0° North, 141.5° East (Wright 2013) | ||
| Basis of coordinate: | based on nearby landmark | ||
| Geographic resolution: | outcrop |
Time
| Period: | Cretaceous | Epoch: | Late Cretaceous |
| Stage: | Cenomanian | 10 m.y. bin: | Cretaceous 5 |
| Key time interval: | Cenomanian | ||
| Age range of interval: | 100.5 - 93.9 m.y. ago |
Stratigraphy
| Formation: | Nagase | ||||
| Stratigraphic resolution: | bed | ||||
| Stratigraphy comments: STRATIGRAPHIC RELATIONS: From the Nagase Fm, which is overlain by the Kajisako Fm. AGE: Cenomanian, on the basis of ammonite, inoceramid, and radiolarian biostratigraphy. STRATIGRAPHIC POSITION: From lower lithostratigraphic unit in regional section; near top of middle part of Nagase Fm. | |||||
Lithology and environment
| Primary lithology: | medium,coarse lithified sandstone |
| Includes fossils? | Y |
| Lithology description: SPECIFIC LITHOLOGY: Coarse-medium grained sandstone LITHIFICATION: Lithified, on the basis of figured specimens and preservation. | |
| Environment: | coastal indet. |
| Geology comments: ENVIRONMENT: Shallow marine siliciclastic setting. | |
Taphonomy
| Modes of preservation: | mold/impression |
| Degree of concentration: | concentrated |
| Size of fossils: | macrofossils |
Collection methods and comments
| Collection methods: | field collection |
| Reason for describing collection: | taxonomic analysis |
| Collection method comments: COLLECTOR: Multiple collectors. REPOSITORY: Dept. of Geology, Kyushu University and Odochi Elementary School, Japan. | |
| Taxonomic list comments:COVERAGE: Probably not exhaustive, but including ammonoidea, inoceramids, bivalves, and radiolarians. NOMENCLATURE: Authoritative publication, with modern nomenclature and species-resolution identifications. | |
Metadata
| Also known as: | Loc. N-6 | ||
| Database number: | 87006 | ||
| Authorizer: | A. Hendy | Enterer: | A. Hendy |
| Modifier: | A. Hendy | Research group: | marine invertebrate |
| Created: | 2009-02-27 20:26:39 | Last modified: | 2025-02-22 15:12:02 |
| Access level: | the public | Released: | 2009-02-27 20:26:39 |
| Creative Commons license: | CC0 | ||
Reference information
Primary reference:
| 29274. | M. Tashiro and T. Kozai. 1982. Part V. Bivalve fossils from the Upper Cretaceous of the Monobe area, Shikoku. Palaeontological Society of Japan Special Papers 25:69-92 [A. Hendy/A. Hendy] |
Secondary references:
| 29273 | T. Matsumoto. 1982. Part V. Upper Cretaceous ammonites from the Monobe area, Shikoku. Palaeontological Society of Japan Special Papers 25:31-55 [A. Hendy/A. Hendy] |