Campbell Ranch
Basic information
Sample name: Campbell Ranch
Sample aka: JODA 140
Reference: W. W. Korth and J. X. Samuels. 2015. New rodent material from the John Day Formation (Arikareean, middle Oligocene to early Miocene) of Oregon. Annals of Carnegie Museum 83(1):19-84 [ER 4186]
Geography
Country: United States
State: Oregon
County: Gilliam
Coordinate: 45.19° N, -120.35° W
Coordinate basis: estimated from map
Formation: John Day
Time interval: Late Oligocene
Zone: Arikareean
Max Ma: 25.9
Min Ma: 23.79
Age basis: Ar-Ar
Geography comments: apparently WSW of Condon, just north of Thirtymile Creek
coordinate estimated using https://www.westernrivers.org/assets/projects/john-day-river-updated-web-map-1597445540.pdf and Google Maps
from the Kimberly Member of the John Day Formation
"Early late Arikareean (late Oligocene, Ar3), between Tin Roof Tuff dated 25.9 ± 0.3 Ma (Albright et al. 2008) and JD-BC-3 tuff dated 23.79 ± 0.18 Ma (Hunt and Stepleton 2004)"
coordinate estimated using https://www.westernrivers.org/assets/projects/john-day-river-updated-web-map-1597445540.pdf and Google Maps
from the Kimberly Member of the John Day Formation
"Early late Arikareean (late Oligocene, Ar3), between Tin Roof Tuff dated 25.9 ± 0.3 Ma (Albright et al. 2008) and JD-BC-3 tuff dated 23.79 ± 0.18 Ma (Hunt and Stepleton 2004)"
Environment
Lithology: not described
Methods
Life forms: rodents
Sample size: 100 specimens
Museum: John Day Fossil Beds National Monument
Sampling comments: there is no discussion of collection methods or dates
only rodents are discussed
only rodents are discussed
Metadata
Sample number: 4651
Contributor: John Alroy
Enterer: John Alroy
Created: 2025-01-09 11:28:38
Modified: 2025-01-09 11:28:38
Abundance distribution
9 species
3 singletons
total count 100
geometric series index: 16.1
Fisher's α: 2.397
geometric series k: 0.6249
Hurlbert's PIE: 0.6945
Shannon's H: 1.4789
Good's u: 0.9700
Each square represents a species. Square sizes are proportional to counts.
• Find matching samples
Register