Also known as Older Black Hawk Ranch; UCMP V-3920, 3921, 3925
Where: Contra Costa County, California (37.8° N, 122.0° W: paleocoordinates 37.1° N, 117.6° W)
• coordinate based on political unit
When: Diablo Formation, Miocene (23.0 - 5.3 Ma)
Environment/lithology: terrestrial; lithology not reported
Size class: macrofossils
Primary reference: K. A. Richey. 1948. Lower Pliocene horses from Black Hawk Ranch, Mount Diablo, California. University of California Publications, Bulletin of the Department of Geological Sciences 28(1):1-44 [J. Alroy/J. Alroy/J. Alroy]more details
Purpose of describing collection: general faunal/floral analysis
PaleoDB collection 19570: authorized by John Alroy, entered by John Alroy on 27.09.1993
Creative Commons license: CC BY (attribution)
Taxonomic list
| Mammalia | |
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Neohipparion trampasense Edwards 1982 hipparionine horse "? Hipparion" from UCMP V-3925; presumably based on a better specimen than Richey's
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