Upper Haborogawa Fm - Sample MN0063, Minorusawa River: Santonian, Japan
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Cephalopoda
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Naefia matsumotoi
Hirano 1991
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Cephalopoda
- Ammonitida
- Baculitidae
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Baculites sp.
Lamarck 1799
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| see common names | |||||||
Geography
| Country: | Japan |
| Coordinates: | 44.3° North, 141.8° East (view map) |
| Paleocoordinates: | 52.4° North, 135.9° East (Wright 2013) |
| Basis of coordinate: | estimated from map |
| Geographic resolution: | outcrop |
Time
| Period: | Cretaceous | Epoch: | Late Cretaceous |
| Stage: | Santonian | 10 m.y. bin: | Cretaceous 6 |
| Key time interval: | Santonian | ||
| Age range of interval: | 85.7 - 83.6 m.y. ago |
Stratigraphy
| Geological group: | Yezo | Formation: | Upper Haborogawa | ||
| Local section: | Minorusawa River | ||||
| Regional section: | Chikubetsu | ||||
| Stratigraphic resolution: | bed | ||||
| Stratigraphy comments: STRATIGRAPHIC RELATIONS: Unit Uf-g, Upper Haborogawa Fm overlying Middle Haborogawa Fm of the Yezo Gp and underlying the Campanian-Maastrichtian Pankezawa Fm. THICKNESS: 500 m. AGE: Santonian, Inoceramus amakusensis zone. STRATIGRAPHIC POSITION: Middle portion of section, near top of 500 m thick Middle Haborogawa Fm. Higher (~300 m) in section than PBDB# 62211 and immediately below PBDB# 62213 and 62214. | |||||
Lithology and environment
| Primary lithology: | bioturbation lithified sandy mudstone |
| Includes fossils? | Y |
| Lithology description: SPECIFIC LITHOLOGY: Bioturbated sandy mudstone. LITHIFICATION: Unknown lithification, assumed to be lithified. | |
| Environment: | offshore |
| Glacial or sequence phase: | regressive |
| 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, assumed to be regressive as in coarsening up portion of sedimentary sequence. | |
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: | 62213 | ||
| Authorizer: | A. Hendy | Enterer: | A. Hendy |
| Modifier: | A. Hendy | Research group: | marine invertebrate |
| Created: | 2006-07-14 20:36:11 | Last modified: | 2025-02-22 15:12:02 |
| Access level: | the public | Released: | 2006-07-14 20:36:11 |
| 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] |