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RE: How can a stone teach you anything?

in #origins • 7 years ago

A quick question. I thought that the weird dating of the old tools is affected by carbon reading method which is regarded to be very unreliable by some theories. Is it so? Please comment. Thx

7 years ago in #origins by
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     7 years ago (edited)

    carbon dating only works in relatively recent times, OSL is more reliable for older stuff of the tool nature.

    The difference between radiocarbon dating and OSL is that the former is used to date organic materials, while the latter is used to date minerals. Events that can be dated using OSL are, for example, the mineral's last exposure to sunlight; Mungo Man, Australia's oldest human find, was dated in this manner. It is also used for dating the deposition of geological sediments after they have been transported by air (aeolian sediments) or rivers (fluvial sediments). In archaeology, OSL dating is applied to ceramics: The dated event is the time of their last heating to a high temperature (in excess of 400 °C).
    Recent OSL dating of stone tools in Arabia pushed the "out-of-Africa" date hypothesis of human migration back 50,000 years and added a possible path of migration from the African continent to the Arabian peninsula instead of through Europe.[2] [3]
    The most popular OSL method is called single-aliquot regeneration (SAR).

    https://en.wikipedia.org/wiki/Optically_stimulated_luminescence

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