“…Part of the Maghreb, Tunisia is characterized by two different geological domains: the folded and faulted Atlas in the north and the stable saharan platform in the south (Caire,1971;Aissaoui, 1984;Addoum, 1995;Jallouli & Mickus, 2000;Bouaziz et al, 2002;Gabtni et al, 2005;Frizon de Lamotte, 2006 ;Missenard, 2006 ;Rigane & Gourmelen, 20011 ).…”