Pike said: "engravings and, in many cases, paintings lack organic pigments or binders suitable for radiocarbon dating.
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As corals grow, they incorporate significant seawater uranium and virtually no thorium into their skeletons.
How does uranium series dating work
This technique, known as uranium-series disequilibrium, is used extensively in earth sciences and avoids the problems related to radiocarbon dating.
These decay chains involve a series of different elements and may be as long as 35 steps, before reaching the stable end product lead.
Their work found that the practice of cave art in europe began up to 10,000 years earlier than previously thought, indicating the paintings were created either by the first anatomically modern humans in europe or, perhaps, by neanderthals.
, the uranium-thorium technique calculates an age from the degree to which secular equilibrium has been restored between the radioactive isotope thorium-230 and its radioactive parent uranium-234 within a sample.
%d bloggers like this:By Aimee Komugabe Uranium series (U-series) dating is based on the uranium and thorium radioactive decay chains.