Martin Ranch (Upper) (Pleistocene of the United States)
Also known as Tule Canyon 2
Where: Briscoe County, Texas (34.5° N, 101.3° W: paleocoordinates 34.5° N, 101.1° W)
• coordinate based on political unit
When: lower Member (Tule Formation), Irvingtonian (1.8 - 0.3 Ma)
Environment/lithology: terrestrial
Primary reference: G. E. Schultz. 1986. U Tex Austin Bureau of Economic Geology Guidebook 22 [J. Alroy/J. Alroy]more details
PaleoDB collection 20412: authorized by John Alroy, entered by John Alroy on 18.02.1993
Creative Commons license: CC BY (attribution)
Taxonomic list
• above Cerro Toledo X ash; i.e., above the upper unit of the Cerro Toledo Rhyolite dated at 1.23 +/- 0.02 (KA on sanidine) by Izett et al. 1981; this is level 41 of Spell et al. 1996, who redate the unit at 1.212 +/- 0.009 Ma (isochron Ar/Ar on sanidine)
Show authors, comments, and common names
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"Glyptotherium cf. arizonae" = Glyptotherium texanum2
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"Mammuthus cf. imperator" = Mammuthus columbi
"Mammuthus cf. imperator" = Mammuthus columbi Falconer 1857 imperial mammoth apparently at this level based on Madden 1983; M. sp. is present in any event
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