Late quaternary sea level changes of Gabes coastal plain and shelf: Identification of the MIS 5c and MIS 5a onshore highstands, southern Mediterranean

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• 作者：MAHER GZAM ; NOUREDDINE EL MEJDOUB ; YOUNES JEDOUI
• 关键词：MIS 5c and MIS 5a ; beach ridges ; sea level changes ; palaeocoastal morphology ; Gulf of Gabes ; Tunisia.
• 刊名：Journal of Earth System Science
• 出版年：2016
• 出版时间：February 2016
• 年：2016
• 卷：125
• 期：1
• 页码：13-28
• 全文大小：4,197 KB
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• 作者单位：MAHER GZAM (1)
  NOUREDDINE EL MEJDOUB (1)
  YOUNES JEDOUI (1)
  
  1. U.R. Applied Hydrosciences, Higher Institute of Water Sciences and Technics, University of Gabes, Zrig, 6072, Gabes, Tunisia.
  
• 刊物类别：Earth and Environmental Science
• 刊物主题：Earth sciences
  Geosciences
  Extraterrestrial Physics and Space Sciences
  
• 出版者：Springer India
• ISSN：0973-774X

文摘

The continental shelf of the Gulf of Gabes is outlined, during the MIS 5c and MIS 5a onshore highstands, by the genesis of forced regressive beach ridges situated respectively at –19 m b.s.l/100 ka and –8 m b.s.l/80 ka. This area, considered as a stable domain since at least the last 130 ka (Bouaziz et al. 2003), is a particular zone for the reconstruction of the late quaternary sea-level changes in the region. Shuttle Radar Topography Mission (SRTM) data and field observations are highlighted to deduce interaction between hydrodynamic factors and antecedent topography. Variations in geomorphology were attributed to geological inheritance. Petrography and sedimentary facies of the submerged coastal ridges reveal that the palaeocoastal morphology was more agitated than today and the fluvial discharges are consistent. Actual morphologic trend deduced from different environment coasts (sandy coasts, sea cliffs and tidal flat) is marked by accumulation of marine sands and progradation.