Climatic change and human activities of northeastern sahara in Holocene |
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Authors: | Zhang Hucai |
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Institution: | (1) Department of Geographical Sciences, Lanzhou University, 730000 Lanzhou, P. R. China |
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Abstract: | Chronology establishment and dating data analyses on lacustrine deposits in northeastern Sahara show that vast fresh lakes
existed over there between 9900–2400 a B. P. Especially, great continuous lakes developed and got their maximum extent during
the period from 9800 a B. P. to 6450 a B. P. From 6000 a B. P. to 3600 a B. P., the evolution of the lakes experienced a new
stage with a property of drastic fluctuations and a periodicity of 600 years, which was the response to the climatic environment
changes. On the aspect of the relation between natural environment and the human, the warm-humid period in the Holocene was
not only a very important time for human development and evolution, but also was a moment for human reproduction and division.
On the other hand, this warm-humid period was also a distinguished time to natural environment changes, the accumulation of
the strong weathered debris and fine materials formed the basements for the formation of the Sahara Desert.
Supported by the National Natural Science Foundation of China, German Research Foundation and Gansu Provincial Natural Science
Foundation. |
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Keywords: | Sahara Holocene palaeo-climate |
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