International dating morocco
“The overall picture that one gets is a hunting encampment,” study author Shannon Mc Pherron, a Max Planck archaeologist, said during Tuesday's briefing.
The hunters carried the flint from a source some 15 miles away; they would have stopped by the cave to eat, light fires and retool their weapons, he said.
The reconstructions of the Irhoud 10 face fall “right in the middle of the recent modern humans,” said Richard Potts, a paleoanthropologist who directs the Smithsonian Institution’s Human Origins Program.
The analysis revealed “small faces shaped distinctively like modern humans,” he said in an email.
Electron resonance spin dating can estimate how long enamel, for instance, has been bombarded by radiation from sediment.
With this method, the scientists determined an Irhoud tooth was 286,000 years old (give or take 30,000 years).
All told, he said, the researchers' estimate of about 315,000 years old is a provisional “best bet,” with the probable range between Three hundred millennia ago, Morocco was wetter and dotted with clumps of trees.
Hublin explored the site several times in the 1980s and 1990s, though he had little luck. In 2003, in Herto, Ethiopia, anthropologists said they found older Homo sapiens, about 160,000 years old.
A method called thermoluminescence, or TL, dating can gauge the last time an object was heated, by measuring the electrons trapped within it.
Fortuitously, the inhabitants of the Jebel Irhoud cave burned their flint tools.
“That was big luck, I would say,” Hublin said during the news conference.
“People must have been involved in heating the flints, and these have been dated directly using well-established TL techniques,” said Richard Roberts, an expert in luminescence dating at the University of Wollongong in Australia who reviewed the dating techniques before the papers' publication.