Ks0002 - Kesennuma area [Yokonuma Fm]: Hauterivian - Barremian, Japan
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
|
Gastropoda
- Heterostropha
- Nerineidae
|
|||||||
|
Bivalvia
- Trigoniida
- Megatrigoniidae
|
|||||||
| see common names | |||||||
Geography
| Country: | Japan |
| Coordinates: | 39.8° North, 141.6° East (view map) |
| Paleocoordinates: | 50.9° North, 146.3° East (Wright 2013) |
| Basis of coordinate: | based on nearby landmark |
| Geographic resolution: | outcrop |
Time
| Period: | Cretaceous | Epoch: | Early Cretaceous |
| Stage: | Hauterivian - Barremian | 10 m.y. bin: | Cretaceous 2 |
| Key time interval: | Hauterivian - Barremian | ||
| Age range of interval: | 132.6 - 121.4 m.y. ago |
Stratigraphy
| Formation: | Yokonuma | ||||
| Stratigraphic resolution: | bed | ||||
| Stratigraphy comments: STRATIGRAPHIC RELATIONS: From the Yokonuma Fm. AGE: Upper Neocomian; placed here in Hauterivian-Barremian by enterer; justification for age not reported in text. STRATIGRAPHIC POSITION: From unknown position within the Yokonuma Fm; sandstone 2 m thick, interbedded between other sandstones. | |||||
Lithology and environment
| Primary lithology: | fine,gray lithified calcareous sandstone |
| Includes fossils? | Y |
| Lithology description: SPECIFIC LITHOLOGY: Dark gray highly calcareous very fine-grained sandstone. LITHIFICATION: Lithified, on the basis of figured specimens. | |
| Environment: | marine indet. |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils |
| Disassociated major elements: | some |
Collection methods and comments
| Collection methods: | field collection |
| Reason for describing collection: | taxonomic analysis |
| Collection method comments: COLLECTOR: T. Oji, H. Maeda, and T. Kase. REPOSITORY: Not stated in text. | |
| Taxonomic list comments:COVERAGE: Exhaustive for gastropods; other taxa (namely bivalves and foraminifera) often present. NOMENCLATURE: Authoritative publication, with relatively modern nomenclature, and species-resolution identifications. | |
Metadata
| Database number: | 91318 | ||
| Authorizer: | A. Hendy | Enterer: | A. Hendy | Research group: | marine invertebrate |
| Created: | 2009-09-14 16:42:43 | Last modified: | 2025-02-22 15:12:02 |
| Access level: | the public | Released: | 2009-09-14 16:42:43 |
| Creative Commons license: | CC0 |
Reference information
Primary reference:
| 30704. | T. Kase. 1984. Early Cretaceous marine and brackish-water Gastropoda from Japan 1-262 [A. Hendy/A. Hendy] |