USGS Mesozoic 18758, Suction Creek: Early/Lower Callovian, Montana
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Cephalopoda
- Nautilida
- Nautilidae
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Eutrephoceras montanensis
Kummel 1954
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| see common names | |||||||
Geography
| Country: | United States | State/province: | Montana | County: | Blaine |
| Coordinates: | 48.2° North, 109.1° West (view map) | ||||
| Paleocoordinates: | 41.7° North, 50.3° West | ||||
| Basis of coordinate: | based on nearby landmark | ||||
| Geographic resolution: | outcrop |
Time
| Period: | Jurassic | Epoch: | Middle Jurassic |
| Stage: | Callovian | 10 m.y. bin: | Jurassic 5 |
| Key time interval: | Early/Lower Callovian | Ammonoid zone: | Kepplerites mclearni |
| Age range of interval: | 165.30000 - 161.50000 m.y. ago |
Lithology and environment
| Primary lithology: | lithified not reported |
| Environment: | marine indet. |
Taphonomy
| Modes of preservation: | mold/impression |
| Size of fossils: | macrofossils |
Collection methods and comments
| Reason for describing collection: | taxonomic analysis |
| Museum repositories: | USNM |
Metadata
| Database number: | 180714 | ||
| Authorizer: | M. Clapham | Enterer: | M. Clapham | Research group: | marine invertebrate |
| Created: | 2016-07-29 00:08:40 | Last modified: | 2016-07-29 00:08:40 |
| Access level: | the public | Released: | 2016-07-29 00:08:40 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 59996. | B. Kummel. 1954. Jurassic nautiloids from western North America. Journal of Paleontology 28:320-324 [M. Clapham/M. Clapham/M. Clapham] |