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Oldest bone and stone tools discovered in Australia
Thursday 03 November 2016

An article by Jonathan Amos BBC Science Correspondent - Rock shelter used by speedy early Australians - reports on the speed at which the first Aboriginal settlers spread across Australia has been underlined by the discovery of an ancient rock shelter north of Adelaide.

Oldest bone and stone tools discovered in Australia

The Warratyi rock shelter located in the Flinders Ranges. The Diprotodon, the size of a hippo, was the largest marsupial that ever lived. The sharpened bone point, dated to be 38,000-40,000 years old, is now the oldest bone tool yet found in Australia. Dating in the shelter. Images (top left clockwise): Giles Hamm, Peter Murray, Giles Hamm & Lee Arnold. 

The Warratyi rock shelter located in the Flinders Ranges has revealed tools and other artefacts that date back to around 49,000 years ago, as reported in the journal Nature. This suggests Aboriginal people colonised large parts of the continent within a few millennia of their arrival.

 
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Lead scientist Giles Hamm states that it is the oldest southernmost site on the continent. Another site in south-western Australia known as Devil's Lair is also significant, but in terms of inland occupation, the Warratyi rock shelter is important geographically because it shows people are moving very quickly around the continent and into the interior part of the continent. Indeed, this shelter is 10,000 years older than anything else discovered so far.

Oldest bone and stone tools discovered in Australia

Co-authors Clifford Coulthard and Sophia Wilton with Christine Coulthard of the Adnyamathanha Traditional Lands Association. Image: Giles Hamm

Clifford Coulthard of the Adnyamathanha Traditional Lands Association, who found the shelter while working alongside Mr Hamm, states that this has not been a surprise. "A lot of the old people said we were here a long time ago. We're all happy about it."

Dating of the sediments and objects in the cave, which include tools, animal bones, charcoal, ash, egg shells and plant material, reveal that humans used the site sporadically over millennia - periods of frequent use interspersed with periods of abandonment. Among the finds are examples of the oldest bone and stone tools in Australia. This pushes back significantly the dates for the development and use of some of these key technologies. The shelter also revealed significant amounts of red ochre, determined to be between 49,000 and 46,000 years old. Ochre is not a local geological resource and must have been imported.

The shelter also revealed a bone specimen from the biggest marsupial that ever lived, the wombat-like creature Diprotodon optatum, and egg shells from the huge flightless bird Genyornis newtoni. This suggests that Warratyi's ancient residents were hunting the local megafauna.

Another team-member, Dr Lee Arnold, emphasized the importance of dating at the Warratyi shelter. In some cases in the past, there has not been enough preservation of materials that are needed to use widely applicable techniques such as radiocarbon dating and optically stimulated luminescence dating. The artefacts of this age are quite close to the limit of radiocarbon dating.

View the Journey of Mankind Genetic Map and read about humankind's global migration:
http://www.bradshawfoundation.com/stephenoppenheimer/index.php

View the rock art in the Australian Rock Art Archive:

http://www.bradshawfoundation.com/bradshaws/index.php

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