Ona Beach: Chattian, Oregon
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Chondrichthyes
- Lamniformes
- Megachasmidae
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Megachasma applegatei
Shimada et al. 2014
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Shimada et al. 2014 | |||||||||
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Mammalia
- Carnivora
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Enaliarctos cf. tedfordi
Berta 1991
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Poust 2018 | 1 specimen | ||||||||
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Mammalia
- Perissodactyla
- Desmostylidae
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Cornwallius sookensis
(Cornwall 1922)
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Domning 2008 | |||||||||
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Mammalia
- Cetacea
- Aetiocetidae
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Aetiocetus weltoni n. sp.
Barnes et al. 1995
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1 specimen | |||||||||
| (1 measurement) | ||||||||||
| see common names | ||||||||||
Geography
| Country: | United States | State/province: | Oregon | County: | Lincoln |
| Coordinates: | 44.5° North, 124.1° West (view map) | ||||
| Paleocoordinates: | 44.2° North, 115.1° West | ||||
| Basis of coordinate: | unpublished field data |
Time
| Period: | Paleogene | Epoch: | Oligocene |
| Stage: | Chattian | 10 m.y. bin: | Cenozoic 4 |
| Key time interval: | Chattian | ||
| Age range of interval: | 27.82 - 23.03 m.y. ago | ||
| Age estimate: | 28.1 to 28 Ma (other) |
Stratigraphy
| Formation: | Yaquina | ||||
| Stratigraphic resolution: | formation | ||||
| Stratigraphy comments: near the top of the Yaquina Formation, very close to the contact with the overlying Nye Formation
UCMP 122900 was found on the same beach as the holotype of A. cotylalveus, and may either have originated from the same stratigraphic horizon (about 28 Ma), or from a slightly younger layer [22, 24]. Although originally thought to date from the latest Oligocene, the uppermost part of the Yaquina formation has now been re-dated to the earliest Chattian (28.1–28.0 Ma [25]; see discussion of A. cotylalveus). (Marx & Fordyce, 2015) | |||||
Lithology and environment
| Primary lithology: | not reported |
| Environment: | deltaic indet. |
| Geology comments: shallow delta | |
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: | UCMP |
Metadata
| Also known as: | UCMP V79013, LACM 4290, UCMP V79036 | ||
| Database number: | 45788 | ||
| Authorizer: | M. Uhen, P. Holroyd | Enterer: | M. Uhen, P. Holroyd |
| Modifier: | M. Uhen | Research group: | vertebrate |
| Created: | 2004-12-01 13:34:18 | Last modified: | 2018-01-02 12:41:21 |
| Access level: | database members | Released: | 2005-03-01 13:34:18 |
| 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:
| 30424 | D. P. Domning. 2008. Desmostylia. In C. M. Janis, G. F. Gunnell, M. D. Uhen (eds.), Evolution of Tertiary Mammals of North America, Volume II 640-645 [M. Uhen/M. Uhen] | |
| 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] | |
| 64368 | A. W. Poust. 2018. Expanding the geographic and geochronologic range of early pinnipeds: New specimens of Enaliarctos from Northern California and Oregon. Acta Palaeontologica Polonica [M. Uhen/M. Uhen] | |
| 55383 | K. Shimada, B. J. Welton, and D. J. Long. 2014. A new fossil megamouth shark (Lamniformes, Megachasmidae) from the Oligocene-Miocene of the western United States. Journal of Vertebrate Paleontology 34(2):281-290 [P. Holroyd/P. Holroyd] |