John Day Unit A: Whitneyan, Oregon

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Mammalia - Rodentia - Allomyidae
Allomys liolophus (Cope 1881)
Fremd 1994
omitted by Albright et al. 2008; possibly from units B/C
Mammalia - Rodentia - Eomyidae
Eomyidae indet. Winge 1887
Fremd 1994
omitted by Albright et al. 2008; possibly from units B/C
Mammalia - Carnivora
presumably the type of Merriam 1930 from Logan Butte, Crook Co.
Mammalia - Carnivora - Amphicyonidae
Mammalia - Carnivora - Canidae
Wang et al. 1999
"Picture Gorge 30, Blue Basin level 1, UCMP loc. V4849-1... basal Turtle Cove"; probably includes third "Nothocyon sp."
Phlaocyon latidens (Cope 1881)
present in unit A and unit B: Wang et al. 1999
Mammalia - Carnivora - Nimravidae
"Nimravus debilis" of Fremd 1994
Mammalia - Tayassuidae
includes "P. osmonti" and "P. sp." of Fremd et al. 1994
Mammalia - Merycoidodontidae
Fremd 1994
includes "E. condoni"; omitted by Albright et al. 2008; possibly from units B/C
Mammalia - Agriochoeridae
Mammalia - Hypertragulidae
Mammalia - Entelodontidae
"Entelodon sp." of Fremd 1994 (see Foss and Fremd 1998)
Mammalia - Perissodactyla - Rhinocerotidae
may include "D. armatum" and/or "D. annectens" of Fremd 1994
Mammalia - Perissodactyla - Equidae
Mammalia
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:49.6° North, 101.9° West (Wright 2013)
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:2025-02-22 15:12:02
Access level:the public Released:1995-03-26 00:00:00
Creative Commons license:CC0
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]