John Day Unit A: Whitneyan, Oregon
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Mammalia
- Perissodactyla
- Rhinocerotidae
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Diceratherium sp.
Marsh 1875
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| may include "D. armatum" and/or "D. annectens" of Fremd 1994 | ||||||||||
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Mammalia
- Perissodactyla
- Equidae
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Mesohippus sp.
Marsh 1875
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Miohippus sp.
Marsh 1874
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Mammalia
- Hypertragulidae
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Hypertragulus hesperius
Hay 1902
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Mammalia
- Agriochoeridae
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Agriochoerus guyotianus
(Cope 1878)
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Agriochoerus macrocephalus
(Cope 1879)
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Mammalia
- Tayassuidae
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Thinohyus lentus
Marsh 1875
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Perchoerus probus
(Leidy 1856)
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| includes "P. osmonti" and "P. sp." of Fremd et al. 1994 | ||||||||||
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Mammalia
- Entelodontidae
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Archaeotherium caninus
(Troxell 1920)
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| "Entelodon sp." of Fremd 1994 (see Foss and Fremd 1998) | ||||||||||
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Mammalia
- Merycoidodontidae
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Eporeodon occidentalis
(Marsh 1873)
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Eucrotaphus trigonocephalus
Cope 1884
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Fremd 1994 | |||||||||
| includes "E. condoni"; omitted by Albright et al. 2008; possibly from units B/C | ||||||||||
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Mammalia
- Carnivora
- Canidae
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Enhydrocyon prolatus
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Phlaocyon latidens
(Cope 1881)
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| present in unit A and unit B: Wang et al. 1999 | ||||||||||
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Archaeocyon pavidus
(Stock 1933)
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Wang et al. 1999 | |||||||||
| "Picture Gorge 30, Blue Basin level 1, UCMP loc. V4849-1... basal Turtle Cove"; probably includes third "Nothocyon sp." | ||||||||||
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Mammalia
- Carnivora
- Amphicyonidae
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Temnocyon altigenis
Cope 1878
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Mammalia
- Carnivora
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Allocyon loganensis
Merriam 1930
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| presumably the type of Merriam 1930 from Logan Butte, Crook Co. | ||||||||||
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Mammalia
- Carnivora
- Nimravidae
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Hoplophoneus strigidens
(Cope 1878)
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Nimravus brachyops
(Cope 1878)
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| "Nimravus debilis" of Fremd 1994 | ||||||||||
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Mammalia
- Rodentia
- Allomyidae
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Allomys liolophus
(Cope 1881)
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Fremd 1994 | |||||||||
| omitted by Albright et al. 2008; possibly from units B/C | ||||||||||
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Mammalia
- Rodentia
- Eomyidae
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Eomyidae indet.
Winge 1887
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Fremd 1994 | |||||||||
| omitted by Albright et al. 2008; possibly from units B/C | ||||||||||
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Mammalia
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Herpetotherium merriami
(Stock and Furlong 1922)
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| presumably includes the type of Stock and Furlong 1922 from Logan Butte | ||||||||||
| see common names | ||||||||||
Geography
| Country: | United States | State/province: | Oregon | County: | Grant |
| Coordinates: | 44.6° North, 119.6° West (view map) | ||||
| Paleocoordinates: | 44.4° North, 108.5° West | ||||
| Basis of coordinate: | estimated from map | ||||
| Geographic resolution: | outcrop |
Time
| Period: | Paleogene | Epoch: | Oligocene |
| Stage: | Rupelian | 10 m.y. bin: | Cenozoic 4 |
| *Period: | Tertiary | ||
| Key time interval: | Whitneyan | ||
| Age range of interval: | 31.8 - 29.5 m.y. ago | ||
| Age estimate: | minimum 30.0 Ma (Ar/Ar) | ||
| * legacy (obsolete) database fields | |||
Stratigraphy
| Formation: | John Day | Member: | Turtle Cove | ||
| Local section: | JohnD | Local bed: | 3 | ||
| Local order: | bottom to top | ||||
| Stratigraphic resolution: | member | ||||
| Stratigraphy comments: SCLF AA date of "30.0?" Ma on A-B Tuff | |||||
Lithology and environment
| Primary lithology: | not reported |
| Environment: | terrestrial indet. |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils |
Collection methods and comments
| Reason for describing collection: | biostratigraphic analysis |
Metadata
| Also known as: | Lower Blue Basin Section | ||
| Database number: | 17349 | ||
| Authorizer: | J. Alroy | Enterer: | J. Alroy |
| Modifier: | B. Allen | Research group: | vertebrate |
| Created: | 1995-03-26 00:00:00 | Last modified: | 2023-07-29 05:17:27 |
| Access level: | the public | Released: | 1995-03-26 00:00:00 |
| Creative Commons license: | CC BY | ||
Reference information
Primary reference:
| 31438. | L. B. Albright, M. O. Woodburne, T. J. Fremd, C. C. Swisher, B. J. MacFadden and G. R. Scott. 2008. Revised chronostratigraphy and biostratigraphy of the John Day Formation (Turtle Cove and Kimberly Members), Oregon, with implications for updated calibration of the Arikareean North American land mammal age. 116(3):211-237 [J. Alroy/J. Alroy] |
Secondary references:
| 6294 | J. Alroy. 2002. Synonymies and reidentifications of North American fossil mammals. [J. Alroy/J. Alroy/M. Kouvari] | |
| 1547 | T. Fremd. 1994. John Day Basin paleontology field trip guide and road log: Society of Vertebrate Paleontology. John Day Fossil Beds National Monument 94-1 [J. Alroy/J. Alroy/M. Uhen] | |
| 1977 | R. M. Hunt, Jr. 1998. Amphicyonidae. 196-227 [J. Alroy/J. Alroy/J. Alroy] | |
| 3558 | X. Wang, R. H. Tedford, and B. E. Taylor. 1999. Phylogenetic systematics of the Borophaginae (Carnivora: Canidae). Bulletin of the American Museum of Natural History 243:1-392 [J. Alroy/J. Alroy/J. Alroy] |