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Giant stone-age axes found in African lake basin

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Author Topic: Giant stone-age axes found in African lake basin  (Read 207 times)
Sebion
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« on: September 12, 2009, 04:38:57 am »

Professor David Thomas, Head of the School of Geography and the Environment at the University of Oxford, said: ‘Many of the tools were found on the dry lake floor, not around its edge, which challenges the view that big lakes were only attractive to humans when they were full of water.

'As water levels in the lake went down, or during times when they fluctuated seasonally, wild animals would have congregated round the resulting watering holes on the lake bed. It’s likely that early human populations would have seen this area as a prolific hunting ground when food resources in the region were more concentrated than at times when the regional climate was wetter and food was more plentiful and the lake was full of water.’

This work is part of an ongoing project investigating the complex history of major changes in climate in Africa. Co-researcher Dr Sallie Burrough has dated the sediment and shorelines of the lake basin, which has shown that the mega lake was filled with water on multiple occasions in the last 250,000 years. The research team has also investigated islands on the floor of the lake - remnants of former sand dunes - which suggest the region’s climate has also been both windier and markedly drier than it is today.

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