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Coniacian carbonate-conglomerate event on carbonate ramps from the Northern Chotts ranges, South Tunisia: facies geometry and tectono-sedimentary evolution

  • Amna Khila
  • Mohamed Ouaja
  • Fouad Zargouni
Original Paper
  • 98 Downloads

Abstract

Conglomerate bodies are wide spread in the Lower Coniacian carbonate of the southern of Tunisia. This paper presents an examination of the stratigraphic architecture of these Coniacian conglomerates. It aims to the understanding of the processes leading to their genesis and the relationship and context with the late Cretaceous sedimentation. These conglomerates are related to the incision of Aptian palaeovalleys in a carbonate platform in an extensional setting. The sedimentary analysis and the geometry of these bodies show that the Cretaceous succession in this area are formed by eight facies within four facies associations, representing a series of distinct depositional environments ranging from alluvial plain to the open marine environment. The sedimentary analysis allowed the recognization of elementary sequence which start with the conglomerate bodies corresponding to the incised valley fills.

Keywords

South Tunisia Coniacian Conglomerates Incised valley Zemlet el Beida 

Notes

Acknowledgements

The authors would like to thank Professor Jean-Yves Reynaud for his constructive suggestions and corrections of an earlier version of the manuscript. Authors would like to thank the anonymous reviewer for his valuable corrections and comments.

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Copyright information

© Saudi Society for Geosciences 2018

Authors and Affiliations

  1. 1.Faculty of Sciences of Tunis, (UR 11ES13) Laboratory of Structural and Applied GeologyUniversity of Tunis el ManarTunisTunisia

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