Bear Springs: Blancan, Arizona

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Mammalia - Proboscidea - Gomphotheriidae
    = Gomphotheriidae indet. Hay 1922
Alroy 2002
? Rhynchotherium sp. Falconer 1868
Mammalia - Carnivora - Mustelidae
Mammalia - Carnivora - Felidae
    = Felinae indet. Trouessart 1885
Alroy 2002
Mammalia - Antilocapridae
Mammalia - Camelidae
Mammalia - Tayassuidae
Mammalia - Perissodactyla - Equidae
    = Nannippus peninsulatus Cope 1885
Alroy 2002
Mammalia - Rodentia - Geomyidae
Geomys sp. Rafinesque 1817
Mammalia - Rodentia - Cricetidae
Sigmodon sp. Say and Ord 1825
see common names

Geography
Country:United States State/province:Arizona County:Graham
Coordinates: 32.8° North, 110.0° West (view map)
Paleocoordinates:33.6° North, 109.0° West (Wright 2013)
Basis of coordinate:stated in text
Geographic resolution:outcrop
Time
10 m.y. bin: Cenozoic 6
*Period:Late/Upper Tertiary *Epoch:Pliocene
*Local age/stage:Blancan
Key time interval: Blancan
Age range of interval: 4.7 - 1.4 m.y. ago
* legacy (obsolete) database fields
Stratigraphy
Formation:Gila Conglomerate
Stratigraphic resolution:member
Stratigraphy comments: mostly from 4 localities within 10 m of section; additional locality about 10 m upsection
Lithology and environment
Primary lithology: sandstone
Secondary lithology: claystone
Environment:fluvial indet.
Geology comments: 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
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils,mesofossils
Disassociated minor elements:many
Collection methods and comments
Collection methods:bulk,surface (float),sieve
Reason for describing collection:biostratigraphic analysis
Metadata
Database number:19651
Authorizer:J. Alroy Enterer:J. Alroy
Modifier:J. Alroy Research group:vertebrate
Created:1993-02-18 00:00:00 Last modified:2025-02-22 15:12:02
Access level:the public Released:1993-02-18 00:00:00
Creative Commons license:CC0
Reference information

Primary reference:
6199.5% 23340Y. 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]

Secondary references:

6294 J. Alroy. 2002. Synonymies and reidentifications of North American fossil mammals. [J. Alroy/J. Alroy/M. Kouvari]