John Day Units B, C, and D: Geringian, Oregon

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Mammalia - Carnivora
Allocyon loganensis Merriam 1930
Mammalia - Carnivora - Amphicyonidae
Temnocyon altigenis Cope 1878
Daphoenus sp. Leidy 1853
Hunt 1998
unit C, Blue Basin: Fremd et al. 1994
Mammalia - Carnivora - Canidae
Phlaocyon latidens (Cope 1881)
Cynarctoides lemur (Cope 1879)
present in unit C: Wang et al. 1999
Rhizocyon oregonensis (Merriam 1906)
Wang et al. 1999
bed C: Fremd et al. 1994
Enhydrocyon oregonensis Thorpe 1922
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
Alroy 2002
Paraenhydrocyon josephi (Cope 1881)
unit C
Mammalia - Carnivora - Nimravidae
Nimravus brachyops (Cope 1878)
includes "N. gomphodus" and possibly "N. sp." of Fremd et al. 1994
? Hoplophoneus sp. Cope 1874
Eusmilus cerebralis (Cope 1880)
recombined as Hoplophoneus cerebralis
Mammalia - Perissodactyla - Equidae
Miohippus sp. Marsh 1874
may include "M. anceps," "M. equiceps," "M. condoni," and/or "M. sp." of Fremd et al. 194
Mammalia - Perissodactyla - Rhinocerotidae
Diceratherium sp. Marsh 1875
may include "D. armatum" and/or "D. annectens" of Fremd et al. 1994
Mammalia - Entelodontidae
Archaeotherium sp. Leidy 1850
Mammalia - Merycoidodontidae
Eporeodon occidentalis (Marsh 1873)
Mammalia - Tayassuidae
Thinohyus sp. Marsh 1875
Mammalia - Agriochoeridae
Agriochoerus guyotianus (Cope 1878)
Fremd 1994
omitted by Albright et al. 2008, who do list "Agriochoerus"
Mammalia - Hypertragulidae
Hypertragulus hesperius Hay 1902
Mammalia - Rodentia - Allomyidae
Allomys sp. Marsh 1877
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]