Johnson Canyon (Miocene of the United States)

Where: Wheeler County, Oregon (44.9° N, 120.2° W: paleocoordinates 44.7° N, 114.5° W)

• coordinate based on political unit

When: John Day Formation, Hemingfordian (20.4 - 16.0 Ma)

Environment/lithology: terrestrial; lithology not reported

Size class: macrofossils

Primary reference: M. C. Coombs, R. M. Hunt, Jr., E. Stepleton, L. B. Albright, III, and T. J. Fremd. 2001. Stratigraphy, chronology, biogeography, and taxonomy of early Miocene small chalicotheres of North America. Journal of Vertebrate Paleontology 21(3):607-620 [J. Alroy/J. Alroy/M. Uhen]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 17958: authorized by John Alroy, entered by John Alroy on 15.05.2002

Creative Commons license: CC BY (attribution)

Taxonomic list

• based on Coombs et al. 2001, the entire section in this canyon is post-Kimberly and therefore equivalent to the Haystack Member, but not in the Haystack sensu stricto
Show authors, comments, and common names
Mammalia
 Perissodactyla - Chalicotheriidae
Moropus oregonensis
Moropus oregonensis Leidy 1873 chalicothere
UNSM specimen from 30 m above the 22.6 Ma tuff, Johnson Canyon
 Perissodactyla - Tapiridae
Miotapirus sp.
Miotapirus sp. Schlaikjer 1937 tapir
new UNSM specimen from 1.5 m above tuff dated at 22.6 Ma, Johnson Canyon