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Holocene Paleoclimatic Variation Inferred from Study of Sediments in the Gulf of Tunis (North Africa)

  • Nizar OuertaniEmail author
  • Soumaya Yahyaoui
Chapter
Part of the Advances in Science, Technology & Innovation book series (ASTI)

Abstract

The lithological study of sediments from a 30 m length core, taken at the western part of the lake of Tunis, combined with the study of benthic macrofauna, helped to identify the different stages of evolution of this ecosystem and the associated climatic fluctuations throughout the period spreading the Tardi Würm (about 42,000 years) to the Holocene. The sedimentological study allowed distinguishing six main facies characterizing different depositional environments. The identification of the mineralogical composition of the Holocene sediments of the upper part of the core, helped to note presence and dominance of two main minerals detected in all samples which are Quartz and Calcite. The determination of TOC contents in samples of Holocene sediments shows the existence of three levels: a surface level with high TOC values (reaching 5.1%), a second level at which values decrease gradually (around 1.1%) and the bottom level with sandy sediment record values <1%.

Keywords

Lake of Tunis Holocene Paleoclimatic fluctuation XRD TOC 

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Copyright information

© Springer Nature Switzerland AG 2019

Authors and Affiliations

  1. 1.Faculty of Science of TunisUniversity Tunis El ManarTunisTunisia

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