Pleistocene vertebrates from the Pecos River valley near Roswell, Chaves County, New Mexico
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River gravels in the Pecos Valley just north of Roswell, Chaves Cor.rnty, New Mexico, produced fossil vertebrates identified as Gopherus cf. G. agassizii, Equus occidentalis, Equus sp., Camelops hesternus, Bison sp., and Mnmmuthus columbi. These fossils indicate a Rancholabrean (late Pleistocene) age and represent the first Pleistocene megafauna described from river gravels in southeast New Mexico. The presence of the tortoise Gopherus suggests a local frost-free climate.
Lucas, Spencer G. and Morgan, Gary S., "Pleistocene vertebrates from the Pecos River valley near Roswell, Chaves County, New Mexico" (2006). KIP Articles. 4330.