Lascaux dating

26 Jan

Here, we present 24 new radiocarbon accelerator mass spectrometry (AMS) and 6 uranium-thorium (U-Th) analyses from the calcite of the gours, 4 AMS 14C dates from charcoals trapped in the calcite, and 4 AMS 14C analyses on organic matter extracted from the calcite.

Combining the calibrated 14C ages obtained on charcoals and organic matter and U-Th ages from 14C analyses made on the carbonate, has allowed the calculation of the dead carbon proportion (dcp) of the carbonate deposits.

The latter, used with the initial atmospheric 14C activities reconstructed with the new Int Cal09 calibration data, allows high-resolution age estimation of the gour calcite samples and their growth rates.

The carbonate deposit grew between 95 yr cal BP (for dcp = 10.7 ± 1.8%; 2 σ) or between 85 yr cal BP (for dcp = 20.5 ± 1.9%; 2 σ).

In total, Lascaux's galleries and passageways - extending about 240 metres in length - contain some 2,000 images, about 900 of which are animals, and the remainder geometric symbols of varying shapes.

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U-series dating of the calcium carbonate layers in the Spanish caves investigated by Pike is the only viable method at present.last week two intriguing possibilities: the famous cave paintings in France and Spain may be as much as 15,000 years older than previously established; Neanderthals may have been cave painters as well as were the anatomically modern humans who replaced them.A team led by Alistair Pike of the University of Bristol in the United Kingdom sought to confirm previously assigned dates or establish new dates for cave paintings by applying uranium series analysis of calcium carbonate deposits overlaying or underlaying paints applied to cave walls.In 1979, Lascaux was added to the list of UNESCO World Heritage Sites, together with another 147 prehistoric sites and 25 decorated caves located in the Vezere Valley of the Correze and Dordogne regions.In 1963, due to continuing environmental problems inside the cave, Lascaux was closed to the public.