USGS Mesozoic loc. 24184: Callovian, Alaska
collected by A. Grantz, R.D. Hoare, R.W. Imlay 1952
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
|
Bivalvia
- Trigoniida
- Myophorellidae
|
|||||||
|
Myophorella orientalis
Kobayashi and Tamura 1955
|
|||||||
| see common names | |||||||
Geography
| Country: | United States | State/province: | Alaska |
| Coordinates: | 62.1° North, 147.4° West (view map) | ||
| Paleocoordinates: | 31.8° North, 82.4° West | ||
| Basis of coordinate: | based on nearby landmark |
Time
| Period: | Jurassic | Epoch: | Middle Jurassic |
| Stage: | Callovian | 10 m.y. bin: | Jurassic 5 |
| Key time interval: | Callovian | ||
| Age range of interval: | 165.30000 - 161.50000 m.y. ago |
Stratigraphy
| Formation: | Chinitna | ||||
| Stratigraphy comments: Reworked concretions in Cretaceous shales containing fossils from Chinitna and Naknek formations and the overlying Nelchina Limestone. Fossils from Callovian, Chinitna Formation. |
Lithology and environment
| Primary lithology: | concretionary "limestone" |
| Secondary lithology: | "shale" |
| Lithology description: Reworked concretions in Cretaceous shales containing fossils from Chinitna and Naknek formations and the overlying Nelchina Limestone. Fossils from Callovian, Chinitna Formation. | |
| Environment: | marine indet. |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils,mesofossils |
Collection methods and comments
| Reason for describing collection: | taxonomic analysis | ||
| Museum repositories: | USNM | ||
| Collectors: | A. Grantz, R.D. Hoare, R.W. Imlay | Collection dates: | 1952 |
Metadata
| Database number: | 139591 | ||
| Authorizer: | G. Stanley | Enterer: | H. Shepherd |
| Created: | 2013-02-14 09:57:21 | Last modified: | 2013-02-13 16:57:21 |
| Access level: | the public | Released: | 2013-02-14 09:57:21 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 40842. | T. P. Poulton. 1979. Jurassic Trigoniid Bivalves from Canada and Western United States of America. Geological Survey of Canada Bulletin 282 [G. Stanley/H. Shepherd/H. Shepherd] |