Martin Ranch (Lower): Irvingtonian, Texas

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Mammalia - Mylodontidae
Glossotherium sp. Owen 1840
    = Mylodontidae indet. Ameghino 1889
Schultz 1990
Mammalia - Perissodactyla - Equidae
Equus simplicidens Cope 1892
recombined as Plesippus simplicidens
Equus semiplicatus Cope 1893
    = Equus sp. Linnaeus 1758
Dalquest and Schultz 1992
Mammalia - Camelidae
Camelops sp. Leidy 1854
Mammalia - Proboscidea - Elephantidae
Mammuthus sp. Brookes 1828
see common names

Geography
Country:United States State/province:Texas County:Briscoe
Coordinates: 34.5° North, 101.3° West (view map)
Paleocoordinates:34.5° North, 101.1° West
Basis of coordinate:based on political unit
Time
Period:Quaternary Epoch:Pleistocene
10 m.y. bin:Cenozoic 6
Key time interval:Irvingtonian
Age range of interval:1.40000 - 0.21000 m.y. ago
Stratigraphy
Formation:Tule Member:lower
Local section:RockC Local bed:1
Local order:bottom to top
Lithology and environment
Environment:terrestrial indet.
Taphonomy
Modes of preservation:body
Collection methods and comments
Taxonomic list comments:below Cerro Toledo X ash, i.e., below the lower unit of the Cerro Toledo Rhyolite, dated at 1.47 +/- 0.04 (isochron KA) by Izett et al. 1981; this is level 22 of Spell et al. 1996, who redate the unit at 1.474 +/- 0.023 Ma (isochron Ar/Ar on sanidine)
not clear which level following records of Dalquest and Schultz 1992 come from: Cynomys cf. ludovicianus Mammuthus cf. imperator Antilocapridae indet.
Madden 1983 claims that Stegomastodon is present; presumably this is the Upper Martin Ranch specimen
Metadata
Also known as:Tule Canyon 1
Database number:20411
Authorizer:J. Alroy Enterer:J. Alroy
Research group:vertebrate
Created:1993-02-18 00:00:00 Last modified:2002-06-03 03:27:44
Access level:the public Released:1993-02-18 00:00:00
Creative Commons license:CC BY
Reference information

Primary reference:
3083. G. E. Schultz. 1986. U Tex Austin Bureau of Economic Geology Guidebook 22 [J. Alroy/J. Alroy]

Secondary references:

6202 W. W. Dalquest and G. E. Schultz. 1992. Ice Age mammals of northwestern Texas 1-309 [J. Alroy/J. Alroy/M. Uhen]
6206 G. E. Schultz. 1990. Stop 8: Biostratigraphy and volcanic ash deposits of the Tule Formation, Briscoe County, Texas. In T. C. Gustavson (ed.), Tertiary and Quaternary stratigraphy and vertebrate paleontology of parts of northwestern Texas and eastern New Mexico; Guidebook - Bureau of Economic Geology, University of Texas at Austin 60-64 [J. Alroy/J. Alroy/J. Alroy]