Okurodani Valley ornithopod site 2: Late Hauterivian - Aptian, Japan
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
|
Osteichthyes
- Iguanodontidae
|
|||||||
| 1 specimen | |||||||
| see common names | |||||||
Geography
| Country: | Japan | State/province: | Honshu | County: | Gifu |
| Coordinates: | 36.0° North, 136.9° East (view map) | ||||
| Paleocoordinates: | 45.1° North, 145.1° East (Wright 2013) | ||||
| Basis of coordinate: | stated in text | ||||
| Geographic resolution: | small collection |
Time
| Period: | Cretaceous | Epoch: | Early Cretaceous |
| Stage: | Hauterivian - Aptian | 10 m.y. bin: | Cretaceous 2 - Cretaceous 3 |
| Key time interval: | Late Hauterivian - Aptian | ||
| Age range of interval: | 132.6 - 113.2 m.y. ago |
Stratigraphy
| Geological group: | Tetori | Formation: | Okurodani | ||
| Stratigraphic resolution: | bed | ||||
| Stratigraphy comments: "early Neocomian"; lower part of formation
The age of the Okurodani Formation is controversial, Kusuhashi et al. (2006) suggested a Barremian-Aptian age according to tuffaceous mudstone zircons, Nagata et al. (2019) suggested an age of 129.2 ± 0.4 (95% CI) Ma, and Sano and Yabe (2017) proposed an age of Late Hauterivian or younger. | |||||
Lithology and environment
| Primary lithology: | fine argillaceous sandstone |
| Secondary lithology: | mudstone |
| Includes fossils? | Y |
| Lithology description: "Alternating beds of muddy fine-grained sandstone, mudstone and coarse-grained sandstone. The dinosaur tooth was collected from a muddy fine-grained sandstone bed." | |
| Environment: | delta plain |
Taphonomy
| Modes of preservation: | body |
| Degree of concentration: | dispersed |
| Size of fossils: | mesofossils |
| Preservation of anatomical detail: | medium |
| Disassociated major elements: | all |
| Fragmentation: | frequent |
Collection methods and comments
| Collection methods: | surface (float),field collection |
| Reason for describing collection: | taxonomic analysis |
Metadata
| Database number: | 50312 | ||
| Authorizer: | M. Carrano | Enterer: | M. Carrano |
| Modifier: | G. Varnham | Research group: | vertebrate |
| Created: | 2005-05-12 11:09:37 | Last modified: | 2025-02-22 15:12:02 |
| Access level: | the public | Released: | 2005-05-12 11:09:37 |
| Creative Commons license: | CC0 |
Reference information
Primary reference:
| 13515. | ETE | Y. Hasegawa, M. Manabe, S. Isaji, M. Ohkura, I. Shibata and I. Yamaguchi. 1995. Terminally resorbed iguanodontid teeth from the Neocomian Tetori Group, Ishikawa and Gifu Prefecture, Japan. Bulletin of the National Science Museum, Tokyo, Series C 21(1, 2):35-49 [M. Carrano/M. Carrano/M. Carrano] |