John Day Units G, H, I, and J: Geringian, Oregon
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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unclassified
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Sciurus wortmani
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Fremd 1994 | |||||||||
| omitted by Albright et al. 2008 | ||||||||||
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= Sciurus vortmani
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Cope 1879 | |||||||||
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Mammalia
- Perissodactyla
- Rhinocerotidae
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Diceratherium armatum
Marsh 1875
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Fremd 1994 | |||||||||
| listed as "Diceratherium" by Albright et al. 2008 | ||||||||||
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Diceratherium annectens
(Marsh 1873)
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Fremd 1994 | |||||||||
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Mammalia
- Perissodactyla
- Equidae
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Miohippus sp.
Marsh 1874
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Fremd 1994 | |||||||||
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Miohippus intermedius
(Osborn and Wortman 1895)
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Fremd 1994 | |||||||||
| listed as "Miohippus" by Albright et al. 2008 | ||||||||||
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Mammalia
- Entelodontidae
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Archaeotherium sp.
Leidy 1850
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Mammalia
- Hypertragulidae
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Hypertragulus hesperius
Hay 1902
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Nanotragulus planiceps
(Sinclair 1905)
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| recombined as Hypertragulus planiceps | ||||||||||
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Mammalia
- Merycoidodontidae
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Eporeodon occidentalis
(Marsh 1873)
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Oreodontoides oregonensis
(Thorpe 1921)
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| original and current combination Eporeodon (Oreodontoides) oregonensis | ||||||||||
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Merycochoerus minor
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| genus assignment unjustified | ||||||||||
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Mammalia
- Carnivora
- Nimravidae
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Nimravus brachyops
(Cope 1878)
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Mammalia
- Carnivora
- Canidae
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Rhizocyon oregonensis
(Merriam 1906)
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| present in Bed J: Wang et al. 1999 | ||||||||||
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Cormocyon copei
Wang and Tedford 1992
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| units G, H, I, and J: Wang et al. 1999 | ||||||||||
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Philotrox condoni
Merriam 1906
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Enhydrocyon stenocephalus
Cope 1879
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Mesocyon brachyops
Merriam 1906
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Mammalia
- Carnivora
- Amphicyonidae
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Daphoenus sp.
Leidy 1853
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Mammalia
- Rodentia
- Allomyidae
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Alwoodia magna
Rensberger 1983
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Allomys simplicidens
Rensberger 1983
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Fremd 1994 | |||||||||
| listed as "Allomys" by Albright et al. 2008 | ||||||||||
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Mammalia
- Rodentia
- Geomyidae
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Pleurolicus sulcifrons
Cope 1878
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Mammalia
- Rodentia
- Castoridae
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Capacikala gradatus
(Cope 1878)
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Mammalia
- Rodentia
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Florentiamys lulli
Wood 1936
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Fremd 1994 | |||||||||
| recombined as Jimomys lulli | ||||||||||
| listed as "Florentiamys" by Albright et al. 2008 | ||||||||||
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Mammalia
- Rodentia
- Aplodontidae
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Meniscomys uhtoffi
Rensberger 1983
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Mammalia
- Rodentia
- Sciuridae
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Protospermophilus vortmani
(Cope 1879)
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Cope 1879 | |||||||||
| omitted by Albright et al. 2008 | ||||||||||
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Mammalia
- Primates
- Ekgmowechashalidae
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Ekgmowechashala sp.
Macdonald 1963
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| said by Fremd et al. 1994 to be from unit K | ||||||||||
| see common names | ||||||||||
Geography
| Country: | United States | State/province: | Oregon | County: | Wheeler |
| Coordinates: | 44.7° North, 119.7° West (view map) | ||||
| Paleocoordinates: | 44.3° North, 109.5° West | ||||
| Basis of coordinate: | estimated from map | ||||
| Geographic resolution: | outcrop |
Time
| Period: | Paleogene | Epoch: | Oligocene |
| 10 m.y. bin: | Cenozoic 4 | ||
| *Period: | Tertiary | ||
| Key time interval: | Geringian | ||
| Age range of interval: | 29.50000 - 24.70000 m.y. ago | ||
| Age estimate: | 28.7 to 27.5 Ma (Ar/Ar) | ||
| * legacy (obsolete) database fields | |||
Stratigraphy
| Formation: | John Day | Member: | Turtle Cove | ||
| Local section: | John Day | Local bed: | 6 | ||
| Local order: | bottom to top | ||||
| Stratigraphic resolution: | member | ||||
| Stratigraphy comments: bracketed by AA dates of 28.7 Ma (Picture Gorge Tuff) and 27.5 Ma (Picture Gorge Ignimbrite); average is 28.1 | |||||
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 |
| Taxonomic list comments:"Cynodictis angustidens" is listed by Fremd et al. 1994, but this usage unjustified and the species is invalid
"Nothocyon sp." is also listed but omitted (understandably) by Albright et al. 1994 Fremd et al. list the following dubious oreodonts that are omitted by Albright et al. 2008: Eucrotaphus trigonocephalus, "Mesoreodon major" = Merycoidodon major, and "Desmatochoerus curvidens" = D. megalodon | |
Metadata
| Also known as: | Longview Ranch Airport Section | ||
| Database number: | 17537 | ||
| Authorizer: | J. Alroy, C. Boyd | Enterer: | J. Alroy, C. Boyd |
| Modifier: | B. Allen | Research group: | vertebrate |
| Created: | 1995-03-26 00:00:00 | Last modified: | 2023-07-29 05:01:20 |
| 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] | |
| 53291 | E. D. Cope. 1879. Second contribution to a knowledge of the Miocene fauna of Oregon. Paleontological Bulletin 31:1-7 [M. Carrano/M. Carrano] | |
| 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] |