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Thread: Earliest Human Presence in North America Dated to the Last Glacial Maximum, 24 000 BP

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    Earliest Human Presence in North America Dated to the Last Glacial Maximum, 24 000 BP

    http://journals.plos.org/plosone/art...l.pone.0169486

    Earliest Human Presence in North America Dated to the Last Glacial Maximum: New Radiocarbon Dates from Bluefish Caves, Canada

    Lauriane Bourgeon, Ariane Burke, Thomas Higham

    PLOS

    Published: January 6, 2017
    http://dx.doi.org/10.1371/journal.pone.0169486

    Abstract

    The timing of the first entry of humans into North America is still hotly debated within the scientific community. Excavations conducted at Bluefish Caves (Yukon Territory) from 1977 to 1987 yielded a series of radiocarbon dates that led archaeologists to propose that the initial dispersal of human groups into Eastern Beringia (Alaska and the Yukon Territory) occurred during the Last Glacial Maximum (LGM). This hypothesis proved highly controversial in the absence of other sites of similar age and concerns about the stratigraphy and anthropogenic signature of the bone assemblages that yielded the dates. The weight of the available archaeological evidence suggests that the first peopling of North America occurred ca. 14,000 cal BP (calibrated years Before Present), i.e., well after the LGM. Here, we report new AMS radiocarbon dates obtained on cut-marked bone samples identified during a comprehensive taphonomic analysis of the Bluefish Caves fauna. Our results demonstrate that humans occupied the site as early as 24,000 cal BP (19,650 ± 130 14C BP). In addition to proving that Bluefish Caves is the oldest known archaeological site in North America, the results offer archaeological support for the “Beringian standstill hypothesis”, which proposes that a genetically isolated human population persisted in Beringia during the LGM and dispersed from there to North and South America during the post-LGM period.

    via Sarkoboros: http://sarkoboros.net/2017/01/lgm-oc...luefish-caves/

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    They analysed 36,000 bones to find 15 which had certain marks from stone tools. The other marks were dismissed as canine bites etc.
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