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Stromatolitic Origin of Laminar Crusts in Palustrine Environments (Pleistocene of Borj Edouana Unit, Northwestern Tunisia)

  • Ildefonso ArmenterosEmail author
  • Naoufel Ghannem
  • Kamel Regaya
Conference paper
Part of the Advances in Science, Technology & Innovation book series (ASTI)

Abstract

The Pleistocene Borj Edouane in NW Tunisia unit consists of two principal facies associations: (1) calcrete-palustrine-laminar crust facies and (2) microbialites. The laminar crusts consist of millimeter-thick couples (ranging from 0.7 to 3 mm thick) of light (from 0.4 to 2 mm) and dark (from 0.2 to 1 mm) laminae. The laminar alternation represents the succession of events with biological remains under quite hydrodynamic conditions (dark laminae) and of slight erosion and transport episodes by thin water sheets and/or eolian activity (detrital phases, light laminae). The presence of intervening intraclastic-ooidal layers indicate erosive processes and the action of weak sheet flows. The laminar crusts were developed in marginal palustrine environments.

Keywords

Laminar crust Palustrine Stromatolitic Spherulite Pleistocene 

Notes

Acknowledgements

This work was supported by the Ministry of Higher Education and Scientific Research of Tunisia and MINECO CGL2014-54818-P.

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Copyright information

© Springer Nature Switzerland AG 2019

Authors and Affiliations

  • Ildefonso Armenteros
    • 1
    Email author
  • Naoufel Ghannem
    • 2
  • Kamel Regaya
    • 2
  1. 1.Salamanca UniversitySalamancaSpain
  2. 2.Faculty of Science of BizerteUniversity of CarthageZarzounaTunisia

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