UCMP A1548, Crescent Bay: Ypresian, Washington
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Cephalopoda
- Nautilida
- Aturiidae
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Aturia sp.
Bronn 1838
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| see common names | |||||||
Geography
| Country: | United States | State/province: | Washington | County: | Clallam |
| Coordinates: | 48.2° North, 123.7° West (view map) | ||||
| Paleocoordinates: | 52.1° North, 104.0° West | ||||
| Basis of coordinate: | based on nearby landmark | ||||
| Geographic resolution: | outcrop |
Time
| Period: | Paleogene | Epoch: | Eocene |
| Stage: | Ypresian | 10 m.y. bin: | Cenozoic 2 |
| Key time interval: | Ypresian | ||
| Age range of interval: | 56.00000 - 47.80000 m.y. ago |
Stratigraphy
| Formation: | Crescent | ||||
| Stratigraphic resolution: | group of beds | ||||
| Stratigraphy comments: About 16 to 20 feet stratigraphically below the contact with the basalt. Based on foraminiferans (Berthiaume 1938; Rau 1964; Tabor & Cady 1978), mollusks (Squires et al. 1992; Squires & Goedert 1994a), and radiometric data (e.g., Globerman et al. 1982; Babcock et al. 1994) the age of the Crescent Formation is middle Early Eocene (Ypresian) | |||||
Lithology and environment
| Primary lithology: | fine,black lithified sandstone |
| Lithology description: Black fine-grained sandstone layer | |
| Environment: | transition zone/lower shoreface |
| Geology comments: Likely shallow marine, on the basis of larger foraminifera and colonial corals to the east at Observatory Point, and on other faunas from the Crescent Formation. Squires et al. (1992) interpreted the Crescent at Pulali Point to be water depths of about 50 m, where storm waves transported basalt boulders into quieter waters. Those lithologies seem roughly similar to the type Crescent Formation, so an offshore transition environment is also used here. | |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils |
Collection methods and comments
| Reason for describing collection: | taxonomic analysis |
| Museum repositories: | UCMP |
Metadata
| Database number: | 180420 | ||
| Authorizer: | M. Clapham | Enterer: | M. Clapham |
| Modifier: | M. Clapham | Research group: | marine invertebrate |
| Created: | 2016-07-16 11:01:44 | Last modified: | 2019-08-06 23:46:32 |
| Access level: | the public | Released: | 2016-07-16 11:01:44 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 59868. | A. K. Miller and H. R. Downs. 1950. Tertiary nautiloids of the Americas: supplement. Journal of Paleontology 24:1-18 [M. Clapham/M. Clapham] |
Secondary references:
| 18061 | E. A. Nesbitt. 2018. Cenozoic Marine Formations of Washington and Oregon: an annotated catalogue. PaleoBios 35:1-20 [M. Uhen/M. Uhen/M. Uhen] |