best online dating for men - U series dating

But he still thinks it most likely that modern humans made the art, because the dates still correspond most closely to the time when was first entering Europe.

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Other archaeologists have argued that artists could have entered Chauvet much later and picked up charcoal that had been lying around for thousands of years.

Now in a paper published online today in , dating expert Alistair Pike of the University of Bristol in the United Kingdom and archaeologist Paul Pettitt of the University of Sheffield in the United Kingdom, together with colleagues in Spain, applied a technique called uranium-series (U-series) dating to artworks from 11 Spanish caves.

When such materials are lying on a cave floor near art on the cave wall, archaeologists have to make many assumptions before concluding that they are contemporary.

Questions have even arisen in cases like the superb renditions of horses, rhinos, and other animals in France's Grotte Chauvet, the cave where researchers have directly radiocarbon dated artworks executed in charcoal to 37,000 years ago.

These elements are usually present in constant (equilibrium) amounts in a sample, as long as the system remains closed.

A closed system is one in which there is no free exchange of elements in a material with the outside environment.

This will give us the precise measure of time that has elapsed since the disruption.

The basic principle of uranium – thorium series dating in corals is that uranium in oxygenated environments is about ten thousand times more soluble in seawater than thorium is.

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 paper.

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