Upper Black Butte (Miocene of the United States)

Also known as OU 2360

Where: Malheur County, Oregon (43.8° N, 118.1° W: paleocoordinates 44.2° N, 116.4° W)

• coordinate estimated from map

When: Hemphillian mammal zone, Drewsey Formation, Late/Upper Miocene (11.6 - 5.3 Ma)

• found in stratigraphic superposition over the Juntura Formation which produces Clarendonian vertebrate fossils


Preservation: original phosphate

Collected by Shotwell; reposited in the OU

Primary reference: J. A. Shotwell. 1963. Mammalian fauna of the Drewsey Formation, Bartlett Mountain, Drinkwater and Otis Basin local faunas. Transactions of the American Philosophical Society 53(1):70-77 [J. Alroy/J. Alroy/R. Hulbert]more details

PaleoDB collection 154947: authorized by Jonathan Bloch, entered by Richard Hulbert on 22.03.2014

Creative Commons license: CC BY (attribution)

Taxonomic list

 Accipitriformes - Accipitridae
 Suliformes - Phalacrocoracidae
Phalacrocorax leptopus n. sp. Brodkorb 1961 cormorant
 Perissodactyla - Equidae
Pliohippus sp. Marsh 1874 horse
probably Dinohippus
 Carnivora - Canidae
"Osteoborus cf. cyonoides" = Borophagus secundus
"Osteoborus cf. cyonoides" = Borophagus secundus VanderHoof 1931 bone-crushing dog
 Ungulata - Antilocapridae
Sphenophalos sp. Merriam 1909 pronghorn