Upper Haborogawa Fm - Sample KM0079, Kinomesawa River: Campanian, Japan
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Bivalvia
- Myalinida
- Inoceramidae
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Sphenoceramus naumanni
(Yokoyama 1890)
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| see common names | |||||||
Geography
| Country: | Japan |
| Coordinates: | 44.3° North, 141.8° East (view map) |
| Paleocoordinates: | 52.3° North, 130.7° East (Wright 2013) |
| Basis of coordinate: | estimated from map |
| Geographic resolution: | outcrop |
Time
| Period: | Cretaceous | Epoch: | Late Cretaceous |
| Stage: | Campanian | 10 m.y. bin: | Cretaceous 7 |
| Key time interval: | Campanian | Inoceramid zone: | Inoceramus japonicus |
| Age range of interval: | 83.6 - 72.2 m.y. ago |
Stratigraphy
| Geological group: | Yezo | Formation: | Upper Haborogawa | ||
| Local section: | Kinomesawa River | Local bed: | 235 m | ||
| Local order: | bottom to top | ||||
| Regional section: | Chikubetsu | ||||
| Stratigraphic resolution: | bed | ||||
| Stratigraphy comments: STRATIGRAPHIC RELATIONS: Unit Ui-j, Upper Haborogawa Fm overlying Middle Haborogawa Fm of the Yezo Gp and underlying the Campanian-Maastrichtian Pankezawa Fm. THICKNESS: 120-150 m. AGE: Campanian-Maastrichtian, but at base of this succession and hence assigned a Campanian age,., Inoceramus japonicus zone. STRATIGRAPHIC POSITION: Upper portion of section, in middle of 120-150 m thick mudstone of the Upper Haborogawa Fm. Immediately above PBDB# 62236, correlative to PBDB# 62237 and imediately below PBDB# 62239. | |||||
Lithology and environment
| Primary lithology: | bioturbation lithified mudstone |
| Includes fossils? | Y |
| Lithology description: SPECIFIC LITHOLOGY: Bioturbated mudstone. LITHIFICATION: Unknown lithification, assumed to be lithified. | |
| Environment: | offshore |
| Geology comments: ENVIRONMENT: No environmental data reported. Assigned to Siliciclastic - offshore on the basis of facies description. TECTONIC SETTING: No tectonic data reported. SEQUENCE STRATIGRAPHY: No sequence stratigraphic data reported. | |
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: Assumed to be collected by authors (Moriya and Hirano) and supplemented by collections of an earlier author Toshimitsu (see Toshimitsu 1988). REPOSITORY: Unknown repository, posibly Waseda University, Japan. | |
| Taxonomic list comments:COMPLETENESS: Fairly comprehensive for all macrofauna. NOMENCLATURE: Not an authoritative publication, but with modern nomenclature and species-level assignments. | |
Metadata
| Database number: | 62238 | ||
| Authorizer: | A. Hendy | Enterer: | A. Hendy |
| Modifier: | G. Palazzo | Research group: | marine invertebrate |
| Created: | 2006-07-15 09:50:38 | Last modified: | 2026-04-20 19:28:34 |
| Access level: | the public | Released: | 2006-07-15 09:50:38 |
| Creative Commons license: | CC0 |
Reference information
Primary reference:
| 17980. | 1% 420 | K. Moriya and H. Hirano. 2001. Cretaceous stratigraphy in the Chikubetsu area, Hokaido. Journal of the Geological Society of Japan 107(3):199-214 [A. Miller/A. Hendy/A. Hendy] |