Fossil Fauna and Flora from Late Pleistocene Cerros Negros Locality, Pinal County, Arizona: with Update of Mammuthus and All Mammut Localities from Arizona

Abstract A fossiliferous remnant of a small lacustrine unit was discovered in an arroyo midway between the Santa Catalina Mountains and the San Pedro River, Pinal County, Arizona. Radiocarbon dates provided a range of 27,000 to 12,000 years before present for existence of the impoundment and accumulation of sediments and enclosed fossils. Mammuthus, Mammut, and Equus formed the megafauna. Mollusks and pollen provided additional evidence for a paleoenvironmental reconstruction of the local area as a pond or small natural impoundment for this late Pleistocene locality. Resumen Un residuo de una pequeña unidad fosilífera lacustre fue descubierto en un arroyo entre las montañas Santa Catalina y el río San Pedro en el condado de Pinal en Arizona. Las fechas por radiocarbono proporcionaron el rango de 27,000 a 12,000 años antes del presente para la existencia del pantano y la acumulación de los sedimentos y los fósiles atrapados. [Introduction] Mammuthus, Mammut, y Equus formaron la megafauna. Moluscos y polen proporcionaron evidencia adicional para la reconstrucción paleoambiental del área local como un estanque o un pequeño charco natural para esta localidad del Pleistoceno tardío.

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