DISCOVERY OF TRIASSIC ROCKS INTERBEDDED W ITHIN THE ALBIAN SEDIMENTS FROM NW TUNISIA (SW OF EL-KEF) IN PROLONGATION OF THE SUBMARINE SALT GLACIERS DOMAIN OF THE ALGERIAN-TUNISIAN CONFINES

In Northwestern Tunisia, close to El Kef, the large outcropping surfac es of Triassic rocks are located between two sedimentary contacts, und erlined by glauconitic conglomerates, which are filled with insoluble Triassic pebbles. In the Kt ed Dalaa, the Triassic rocks overlie confo rmably, sometimes in angular disconformity, a well-dated anticlinal bu ilt by a marly and calcareous-marly Lower Albian, in normal sequence a ccording to its sedimentary features. In the area of Bled el Mzira the y are covered conformably by a thick sequence beginning with Middle Al bian planktonic beds. This setting, interpreted also in the nearby Dj. Ouenza and Ladjebel areas of easternmost Algeria, as a sub-marine ''s alt-glacier'', allows simple explanation of: the existence of Miocene synclines directly and conformably overlying only the Triassic rocks, and the recent concept of ''diapirs without surface salt''.