PALYNOSTRATIGRAPHY OF THE NUMIDIAN FLYSCH OF NORTHERN TUNISIA (OLIGOCENE-EARLY MIOCENE)

Abstract

Abstract Diverse and relatively well preserved palynological assemblages from five outcrop sections sampled in the Numidian Flysch of northern Tunisia are presented and discussed. They provide valuable information for age determination and correlation within the Numidian succession. The dinoflagellate cyst zonation scheme of Wilpshaar et al. (1996) for the Oligocene through earliest Miocene of the central Mediterranean area is successfully applied. The basal portion of the Numidian Flysch, which exhibits a faulted contact with the underlying units, crops out in the El Gassaa and Tabarka sections and is dated as early Early Oligocene (Areosphaeridium diktyoplokum‐Reticulatosphaera actinocoronata Zones of Brinkhuis and Biffi, 1993), thus definitely older than previously inferred on the basis of scarce foraminiferal faunas. The youngest beds analysed in the Cap Serrat section are dated as Aquitanian in age (Membranilarnacia ?picena Zone of Brinkhuis et al., 1992) but, as the topmost portions of the Cap Serra...