John Day Units B, C, and D: Geringian, Oregon
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Mammalia
- Rodentia
- Allomyidae
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Allomys sp.
Marsh 1877
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Mammalia
- Merycoidodontidae
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Eporeodon occidentalis
(Marsh 1873)
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Mammalia
- Agriochoeridae
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Agriochoerus guyotianus
(Cope 1878)
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Fremd 1994 | |||||||||
omitted by Albright et al. 2008, who do list "Agriochoerus" | ||||||||||
Mammalia
- Hypertragulidae
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Hypertragulus hesperius
Hay 1902
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Mammalia
- Entelodontidae
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Archaeotherium sp.
Leidy 1850
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Mammalia
- Tayassuidae
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Thinohyus sp.
Marsh 1875
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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 et al. 1994 | ||||||||||
Mammalia
- Perissodactyla
- Equidae
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Miohippus sp.
Marsh 1874
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may include "M. anceps," "M. equiceps," "M. condoni," and/or "M. sp." of Fremd et al. 194 | ||||||||||
Mammalia
- Carnivora
- Nimravidae
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? Hoplophoneus sp.
Cope 1874
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Eusmilus cerebralis
(Cope 1880)
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recombined as Hoplophoneus cerebralis | ||||||||||
Nimravus brachyops
(Cope 1878)
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includes "N. gomphodus" and possibly "N. sp." of Fremd et al. 1994 | ||||||||||
Mammalia
- Carnivora
- Canidae
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Paraenhydrocyon josephi
(Cope 1881)
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unit C | ||||||||||
Enhydrocyon oregonensis
Thorpe 1922
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Fremd 1994 | |||||||||
may be the type, see Thorpe 1922 and Wang 1994; omitted by Albright et al. 2008, who do list "Enhydrocyon" | ||||||||||
= Enhydrocyon stenocephalus
Cope 1879
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Alroy 2002 | |||||||||
Rhizocyon oregonensis
(Merriam 1906)
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Wang et al. 1999 | |||||||||
bed C: Fremd et al. 1994 | ||||||||||
Cynarctoides lemur
(Cope 1879)
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present in unit C: Wang et al. 1999 | ||||||||||
Phlaocyon latidens
(Cope 1881)
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Mammalia
- Carnivora
- Amphicyonidae
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Temnocyon altigenis
Cope 1878
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Daphoenus sp.
Leidy 1853
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Hunt 1998 | |||||||||
unit C, Blue Basin: Fremd et al. 1994 | ||||||||||
Mammalia
- Carnivora
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Allocyon loganensis
Merriam 1930
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see common names |
Geography
Country: | United States | State/province: | Oregon | County: | Wheeler |
Coordinates: | 44.7° North, 119.6° West (view map) | ||||
Paleocoordinates: | 44.3° North, 109.5° West | ||||
Basis of coordinate: | estimated from map | ||||
Geographic resolution: | local area |
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: | minimum 28.9 Ma (Ar/Ar) | ||
* legacy (obsolete) database fields |
Stratigraphy
Formation: | John Day | Member: | Turtle Cove | ||
Local section: | John Day | Local bed: | 4 | ||
Local order: | bottom to top | ||||
Stratigraphic resolution: | member | ||||
Stratigraphy comments: SCLF AA date of 28.9 Ma on Blue Basin Tuff between units E and F |
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: | Upper Blue Basin Section; Lower Foree Section | ||
Database number: | 17508 | ||
Authorizer: | J. Alroy | Enterer: | J. Alroy |
Modifier: | B. Allen | Research group: | vertebrate |
Created: | 1995-03-26 00:00:00 | Last modified: | 2023-07-29 05:52:35 |
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] | |
18263 | D. S. Berman. 1976. A new amphisbaenian (Reptilia: Amphisbaenia) from the Oligocene-Miocene John Day Formation, Oregon,. Journal of Paleontology 50(1):165-174 [C. Bell/C. Bell] | |
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] |