Stone Age engravings found on ostrich shells

Published on March 3rd, 2010 | by Admin

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shells

Engravings on ostrich shells which date back 60,000 years may be examples of a symbolic communication system among African hunter-gatherers.

The unusually large sample of 270 engraved eggshell fragments, mostly excavated over the past several years at Diepkloof Rock Shelter in South Africa, displays two standard design patterns, according to a team led by archaeologist Pierre-Jean Texier of the University of Bordeaux 1 in Talence, France. Each pattern enjoyed its own heyday between approximately 65,000 and 55,000 years ago, the investigators report in a paper to be published this week in the Proceedings of the National Academy of Sciences.

Researchers already knew that the Howiesons Poort culture, which engraved the eggshells, engaged in other symbolic practices, such as engraving designs into pieces of pigment, that were considered to have been crucial advances in human behavioral evolution. But the Diepkloof finds represent the first archaeological sample large enough to demonstrate that Stone Age people created design traditions, at least in their engravings, Texier says.

Evidence of intentionally produced holes in several Diepkloof eggshells indicates that ancient people made what amounted to canteens out of them, a practice that researchers have documented among modern hunter-gatherers in southern Africa.

The engraved patterns probably identified the eggshells as the property of certain groups or communities, Texier proposes.

“The Diepkloof engravings were clearly made for visual display and recognized as such by a large audience comprising members of a community, and probably members of related communities,” comments University of Bordeaux 1 archaeologist Francesco d’Errico, who was not involved in the new study.

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