Bear Springs ( of the United States)

Where: Graham County, Arizona (32.8° N, 110.0° W: paleocoordinates 33.0° N, 109.4° W)

• coordinate stated in text

• outcrop-level geographic resolution

When: Gila Conglomerate Formation, Blancan (4.9 - 1.8 Ma)

• mostly from 4 localities within 10 m of section; additional locality about 10 m upsection

• member-level stratigraphic resolution

Environment/lithology: fluvial; sandstone and claystone

• said to be from the "silt and sand facies," but most fossil collections are shown in sandstone or claystone horizons

•said to be from "alluvial fan" deposits

Size classes: macrofossils, mesofossils

Collection methods: bulk, surface (float), sieve

Primary reference: Y. Tomida. 1987. Small mammal fossils and correlation of continental deposits, Safford and Duncan basins, Arizona. National Science Museum 1-141 [J. Alroy/J. Alroy/J. Alroy]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 19651: authorized by John Alroy, entered by John Alroy on 18.02.1993

Creative Commons license: CC BY (attribution)

Taxonomic list

Mammalia
 Rodentia - Geomyidae
Geomys sp. Rafinesque 1817 pocket gopher
 Rodentia - Cricetidae
Sigmodon sp. Say and Ord 1825 cotton rat
 Perissodactyla - Equidae
Nannippus peninsulatus Cope 1885 hipparionine horse
Equus sp. Linnaeus 1758 horse
 Artiodactyla - Tayassuidae
Platygonus sp. Leconte 1848 peccary
 Artiodactyla - Camelidae
Camelops sp. Leidy 1854 camel
Hemiauchenia sp. Gervais and Ameghino 1880 camel
 Artiodactyla - Antilocapridae
Antilocapridae indet. Gray 1866 pronghorn
 Carnivora - Felidae
Felinae indet. Trouessart 1885 cat
 Carnivora - Mustelidae
Trigonictis macrodon Cope 1868 mustelid carnivore
 Proboscidea - Gomphotheriidae
Gomphotheriidae indet. Hay 1922 gomphothere
? Rhynchotherium sp. Falconer 1868 gomphothere