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Université de Fribourg

The filament event near the Cenomanian-Turonian boundary in Tunisia: filament origin and environmental signification

Negra, Mohamed Hédi ; Zagrarni, Mohamed Faouzi ; Hanini, Amine ; Strasser, André

In: Bulletin de la Société Géologique de France, 2011, vol. 182, no. 6, p. 507-519

Near the Cenomanian-Turonian boundary, the filament event corresponds to the massive occurrence of thin elongate shells, probably bivalves which constitute, in the Bahloul Formation, about 40% of allochems. This biosedimentary event was described in several areas, such as in Tunisia, Algeria, Morocco, North America, Oman and Tibet. In Tunisia, filaments are well represented within well laminated...