IK2715, Pombetsu-gonosawa Creek, Mikasa City: Late Coniacian, Japan
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
|
Cephalopoda
- Ammonitida
- Scaphitidae
|
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| see common names | |||||||
Geography
| Country: | Japan |
| Coordinates: | 43.3° North, 142.0° East (view map) |
| Paleocoordinates: | 51.3° North, 139.4° East (Wright 2013) |
| Basis of coordinate: | estimated from map |
| Geographic resolution: | outcrop |
Time
| Period: | Cretaceous | Epoch: | Late Cretaceous |
| Stage: | Coniacian | 10 m.y. bin: | Cretaceous 6 |
| Key time interval: | Late Coniacian | Inoceramid zone: | Inoceramus mihoensis |
| Age range of interval: | 89.8 - 85.7 m.y. ago |
Stratigraphy
| Formation: | Kashima | ||||
| Local section: | Ikushunbetsu-Pombetsu | Local bed: | 465.9 m | ||
| Local order: | bottom to top | ||||
| Stratigraphic resolution: | bed | ||||
| Stratigraphy comments: STRATIGRAPHIC RELATIONS: From an unnamed lithostratigraphic unit, given as Kashima Formation by Tanabe (2022), which overlies the Turonian Mikasa Formation. AGE: Late Coniacian, based on ammonite and inoceramid biostratigraphy (given as late Coniacian Inoceramus mihoensis zone on strat column, but early-mid Coniacian Inoceramus uwakimensis zone in table). STRATIGRAPHIC POSITION: From near top of local regional section | |||||
Lithology and environment
| Primary lithology: | tuffaceous lithified siltstone |
| Includes fossils? | Y |
| Lithology description: GENERAL LITHOLOGY: Siltstone. LITHIFICATION: Lithified, on the basis of figured specimens. | |
| Environment: | coastal indet. |
| Geology comments: ENVIRONMENT: Inshore to nearshore and nearshore to offshore or deeper waters. | |
Taphonomy
| Modes of preservation: | cast,mold/impression |
| Size of fossils: | macrofossils |
Collection methods and comments
| Collection excludes: | some genera,some macrofossils |
| Collection methods: | field collection |
| Reason for describing collection: | taxonomic analysis |
| Collection method comments: COLLECTOR: Tanabe et al. (1977). REPOSITORY: Dept. of Geology, Kyushu University, Japan. | |
| Taxonomic list comments:COVERAGE: Limited to representative scaphitid ammonites. NOMENCLATURE: Authoritative publication, with modern nomenclature and species-resolution identifications. | |
Metadata
| Database number: | 86992 | ||
| Authorizer: | A. Hendy | Enterer: | A. Hendy |
| Modifier: | G. Palazzo | Research group: | marine invertebrate |
| Created: | 2009-02-26 22:29:20 | Last modified: | 2026-09-11 16:49:43 |
| Access level: | the public | Released: | 2009-02-26 22:29:20 |
| Creative Commons license: | CC0 |
Reference information
Primary reference:
| 29266. | K. Tanabe. 1977. Mid-Cretaceous scaphitid ammonites from Hokkaido. Palaeontological Society of Japan Special Papers 21:11-22 [A. Hendy/A. Hendy] |
Secondary references:
| 82318 | K. Tanabe. 2022. Late Cretaceous dimorphic scaphitid ammonoid genus Yezoites from the circum-North Pacific regions. Paleontological Research 26:233-269 [M. Clapham/M. Clapham] |