Uranium-series dating reveals Iberian paintings are Europe's oldest
"Uranium-series dating of gypsum speleothems: methodology and
-series dating takes advantage of the fact that calcite, the form of calcium carbonate in stalactites and stalagmites, contains trace amounts of radioactive uranium-238, which decays to form atomic elements including radioactive thorium-230. the dating of the spanish caves leaves many gaps in a supposed sequence of increasing stylistic complexity, say archaeologists iain davidson of the university of new england in armidale, australia, and nicolas teyssandier of the university of toulouse. note that to calculate an age using this technique the ratio of uranium-234 to its parent isotope uranium-238 must also be measured.
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Did Neandertals Paint Early Cave Art? | Science | AAAS
the team argues that the new dating, along with similar dates from sites such as abri castanet in france, where archaeologists recently dated depictions of female genitalia to at least 37,000 years ago, suggests that the earliest european artists "were less concerned with animal depictions" and more interested in simpler motifs such as "red dots, disks, lines, and hand stencils," as they put it in the science paper.–thorium dating, also called thorium-230 dating, uranium-series disequilibrium dating or uranium-series dating, is a radiometric dating technique commonly used to determine the age of calcium carbonate materials such as speleothem or coral.–thorium dating has an upper age limit of somewhat over 500,000 years, defined by the half-life of thorium-230, the precision with which we can measure the thorium-230/uranium-234 ratio in a sample, and the accuracy to which we know the half-lives of thorium-230 and uranium-234.
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Uranium–thorium dating - Wikipedia
wikibook historical geology has a page on the topic of: u-pb, pb-pb, and fission track dating. french dating team at chauvet is disdainful of such a conclusion. dating expert thomas higham of the university of oxford in the united kingdom calls it "a very convincing study," adding that "it is just possible that a neandertal hand was involved," in making the red disk.
Uranium-series Dating of Marine and Lacustrine Carbonates
 unlike other commonly used radiometric dating techniques such as rubidium–strontium or uranium–lead dating, the uranium-thorium technique does not measure accumulation of a stable end-member decay product. u-series dating has been around since the 1950s and is often used to date caves, corals, and other proxies for climate and sea level changes. and given the apparent success of pike and his colleagues in coming up with new dates for the spanish caves, u-series may eventually change the landscape of european cave art.