UCMP 2572, Pinole Junction Site 1 (Neogene of the United States)

Where: Contra Costa County, California (38.0° N, 122.2° W: paleocoordinates 37.5° N, 119.8° W)

• coordinate based on political unit

• small collection-level geographic resolution

When: Pinole Tuff Formation, Hemphillian (10.3 - 4.9 Ma)

Environment/lithology: terrestrial; lithology not reported

Size class: macrofossils

Reposited in the UCMP

Primary reference: R. A. Stirton. 1939. Cenozoic Mammal Remains From the San Francisco Bay Region. University of California Publications, Bulletin of the Department of Geological Sciences 24(13):339-410 [J. Alroy/J. Alroy/J. Marcot]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 19479: authorized by John Alroy, entered by John Alroy on 26.03.1995, edited by Jonathan Marcot

Creative Commons license: CC BY (attribution)

Taxonomic list

• "same horizon" as Site 2
dated at 5.3 +/- 0.1 Ma: Tedford et al. 1987, who place the fauna above the Mulholland Fm. but do not discuss their correlation; the stratigraphic position of the Pinole Tuff was clearly unknown to Stirton and is not mentioned by Creely et al. 1982, but Tedford et al. 1987 indicate that the tuff between the Green Valley and Tassajara Fms. is unambiguously correlated with the Pinole Tuff on geochemical grounds
some "Pinole Tuff" records may not pertain to this site
this forms most of the Pinole Tuff list of Merriam 1917, which also includes a rhino and a proboscidean
Mammalia
 Rodentia - Cricetidae
Miotomodon mayi n. sp.4 Korth 2011 mouse
"Pinole"
 Lagomorpha - Leporidae
Hypolagus edensis7 Frick 1921 rabbit
from "Pinole Tuff"; "Leporidae indet." is listed by Stirton
 Perissodactyla - Equidae
Neohipparion eurystyle5 Cope 1893 hipparionine horse
"Pinole Tuff"
Dinohippus sp.1 Quinn 1955 horse
 Artiodactyla - Camelidae
Camelidae indet. Gray 1821 camel
 Artiodactyla - Antilocapridae
? Sphenophalos sp. Merriam 1909 pronghorn
 Carnivora - Felidae
Machairodus sp.5 Kaup 1833 cat
"Pinole Tuff"
 Carnivora - Mustelidae
Cernictis hesperus n. sp. Hall 1935 mustelid carnivore
Plesiogulo lindsayi2 Harrison 1981 mustelid carnivore
"Pinole Tuff"
 Carnivora - Canidae
Borophagus sp.6 Cope 1892 bone-crushing dog
indeterminate and listed under B. parvus on basis of geographic location only; "? Osteoborus sp."
 Megatherioidea - Megalonychidae
Megalonyx sp.3 Harlan 1825 edentate