Twin River Quarry: Chattian, Washington
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Mammalia
- Cetacea
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Sitsqwayk cornishorum n. sp.
Peredo and Uhen 2016
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Peredo and Uhen 2016 | 1 specimen | ||||||||
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Mammalia
- Cetacea
- Aetiocetidae
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Chonecetus goedertorum n. sp.
Barnes et al. 1995
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1 specimen | |||||||||
| recombined as Fucaia goedertorum | ||||||||||
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Reptilia
- Suliformes
- Plotopteridae
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Klallamornis abyssa n. gen., n. sp.
Mayr and Goedert 2016
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Mayr and Goedert 2016 | 1 specimen | ||||||||
| precise locality information not listed for this occurrence | ||||||||||
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Gastropoda
- Cassidae
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Liracassis apta
(Tegland 1931)
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Nesbitt 2005 | |||||||||
| see common names | ||||||||||
Geography
| Country: | United States | State/province: | Washington | County: | Clallam |
| Coordinates: | 48.2° North, 124.0° West (view map) | ||||
| Paleocoordinates: | 47.9° North, 115.4° West | ||||
| Basis of coordinate: | estimated from map |
Time
| Period: | Paleogene | Epoch: | Oligocene |
| Stage: | Chattian | 10 m.y. bin: | Cenozoic 4 |
| Key time interval: | Chattian | ||
| Age range of interval: | 27.82000 - 23.03000 m.y. ago | ||
| Age estimate: | 28.1 to 26.5 Ma (other) |
Stratigraphy
| Geological group: | Twin River | Formation: | Pysht | ||
| Stratigraphic resolution: | formation | ||||
| Stratigraphy comments: latest Oligocene
early Chattian (28.1–26.5 Ma). Samples of the Pysht Formation from either side of Twin Rivers correlate with Chrons C9r–C8r (28.1–26.5 Ma) [106]. (Marx & Fordyce, 2015) | |||||
Lithology and environment
| Primary lithology: | concretionary mudstone |
| Environment: | basinal (siliceous) |
| Geology comments: whale fall | |
Taphonomy
| Modes of preservation: | body,original phosphate |
| Size of fossils: | macrofossils |
Collection methods and comments
| Collection methods: | surface (in situ),field collection |
| Reason for describing collection: | taxonomic analysis |
| Museum repositories: | LACM |
Metadata
| Also known as: | LACM 5930 | ||
| Database number: | 45784 | ||
| Authorizer: | M. Uhen | Enterer: | M. Uhen, C. Peredo |
| Modifier: | M. Uhen | Research group: | vertebrate |
| Created: | 2004-12-01 11:22:57 | Last modified: | 2024-04-24 08:52:22 |
| Access level: | the public | Released: | 2004-12-01 11:22:57 |
| Creative Commons license: | CC BY | ||
Reference information
Primary reference:
| 12130. | L. G. Barnes, M. Kimura, H. Furusawa and H. Sawamura. 1995. Classification and distribution of Oligocene Aetiocetidae (Mammalia; Cetacea; Mysticeti) from western North America and Japan. The Island Arc 3(4):392-431 [M. Uhen/M. Uhen/M. Uhen] |
Secondary references:
| 55050 | F. G. Marx and R. E. Fordyce. 2015. Baleen boom and bust: a synthesis of mysticete phylogeny, diversity and disparity. Royal Society Open Science 2:140434 [M. Uhen/M. Uhen] | |
| 60404 | G. Mayr and J. L. Goedert. 2016. New Late Eocene and Oligocene Remains of the Flightless, Penguin-Like Plotopterids (Aves, Plotopteridae) from Western Washington State, U.S.A. Journal of Vertebrate Paleontology 36(4):e1163573 [M. Uhen/M. Uhen] | |
| 55201 | E. A. Nesbitt. 2005. A novel trophic relationship between cassid gastropods and mysticete whale carcasses. Lethaia 38:17-25 [M. Uhen/M. Uhen/M. Uhen] | |
| 60914 | C. M. Peredo and M. D. Uhen. 2016. A new basal chaeomysticete (Mammalia: Cetacea) from the Late Oligocene Pysht Formation of Washington, USA. Papers in Palaeontology 2(4):533-554 [M. Uhen/C. Peredo/M. Uhen] |