Pleistocene mammals from Zuni Pueblo, west-central New Mexico
Spencer G. Lucas and Gary S. Morgan


Pleistocene mammals are known from two localities on Zuni Pueblo in McKinley County, west-central New Mexico, Black Rock and Trapped Rock Draw. The Black Rock locality yielded fossils of the beaver Castor canadensis, the horse Equus sp., an indeterminate camelid, the woodland muskox Bootherium bombifrons, the bison Bison sp. and the Columbian mammoth, Mammuthus columbi. The American mastodont Mammut americanum is the only species known from the Trapped Rock Draw locality. The Black Rock locality is Rancholabrean and is from sediments that overlay the Black Rock basalt fl ow, which has an Ar/Ar age of 0.164 + 0.035 Ma. The Trapped Rock Draw locality probably is also of late Pleistocene age. Most of the Pleistocene mammals from Zuni Pueblo are typical representatives of New Mexico’s Rancholabrean megafauna, but the records of Castor canadensis, Bootherium bombifrons and Mammut americanum are relatively rare for the state. They suggest wet, cool and/or forested conditions at Zuni Pueblo during part of the Rancholabrean.


  1. Lucas, Spencer G.; Morgan, Gary S., 2003, Pleistocene mammals from Zuni Pueblo, west-central New Mexico, in: Geology of the Zuni Plateau, Lucas, Spencer G.; Semken, Steven C.; Berglof, William R.; Ulmer-Scholle, Dana S., New Mexico Geological Society, Guidebook, 54th Field Conference, pp. 413-418.

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