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Age of Mexican ash with alleged ‘footprints’

Author

Listed:
  • Paul R. Renne

    (Berkeley Geochronology Center
    University of California)

  • Joshua M. Feinberg

    (University of California)

  • Michael R. Waters

    (Texas A&M University)

  • Joaquin Arroyo-Cabrales

    (Laboratório de Arqueozoología, Subdirección de Laboratórios y Apoyo Académico, Instituto Nacionál de Antropología e Historia)

  • Patricia Ochoa-Castillo

    (Subdirección de Arqueología, Museo Nacional de Antropología, Reforma y Gandhi s/n)

  • Mario Perez-Campa

    (Proyecto Cuicuilco, Instituto Nacionál de Antropología e Historia)

  • Kim B. Knight

    (University of California)

Abstract

Step change A report of human footprints preserved in 40,000-year-old volcanic ash in Mexico is challenged in an online Brief Communication Arising. Announced to the press in July this year, if true the discovery would overturn current theories on the timing of human migration to the Americas (believed to be some 30,000 years later). Argon dating and palaeomagnetic analysis show that the surface on which the prints were found is about 1.3 million years old, making it unlikely that these were human as they would then pre-date the appearance of Homo sapiens in Africa by over a million years.

Suggested Citation

  • Paul R. Renne & Joshua M. Feinberg & Michael R. Waters & Joaquin Arroyo-Cabrales & Patricia Ochoa-Castillo & Mario Perez-Campa & Kim B. Knight, 2005. "Age of Mexican ash with alleged ‘footprints’," Nature, Nature, vol. 438(7068), pages 7-8, December.
  • Handle: RePEc:nat:nature:v:438:y:2005:i:7068:d:10.1038_nature04425
    DOI: 10.1038/nature04425
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