Johnson Canyon (Miocene of the United States)
Where: Wheeler County, Oregon (44.9° N, 120.2° W: paleocoordinates 44.7° N, 114.2° W)
• coordinate based on political unit
When: John Day Formation, Hemingfordian (20.4 - 16.0 Ma)
Environment/lithology: terrestrial
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
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
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Moropus oregonensis Leidy 1873 chalicothere UNSM specimen from 30 m above the 22.6 Ma tuff, Johnson Canyon
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Miotapirus sp. Schlaikjer 1937 tapir new UNSM specimen from 1.5 m above tuff dated at 22.6 Ma, Johnson Canyon
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