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  • For the southern Sahara and the Sahelian zone of the Republic of Niger, a regular occurence of dust sediments has been proved. As for the southern Sahara, two sedimentary cycles are documented. Between the ancient dunes of the Sahel, (Para
  • Quaternary climatic fluctuations in the southern marginal zone of the Sahara led to considerable changes in the drainage systems, due to varying intensities of aeolian and fluvial processes. By means of interpretation of satellite images, formerly