1. Départment de Geologie, Laboratoire de Ressources Minérales et Environnement, Université Tunis el Manar, Faculté des Sciences de Tunis, 2092 El Manar Tunis, Tunisia (corresponding author).
2. Deptartment of Geology, Museo Nacional de Ciencias Naturales (CSIC), C/Jose Gutierrez Abascal 2, Madrid 28006, Spain.
3. Ph.D. Student, Restorarion of Historical Constructions, Urban Evolution and Refurbishment, H.T.S. Architecture, Univ. of the Basque Country (UPV/EHU), Plaza Oñati 2, Donostia-San Sebastian 20018, Spain.