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Pollen analyses, supported by C-14 AMS datations, reflect the successive set in of new environmental conditions at the Late Glacial/Holocene transition ca. 10,500-10,000, within the paleosabkha sediments of Kasserine, southern Tunisia. In the pollen sequence, an herbaceous floristic unusual phase with no clear indications of a possible drastic Younger Dryas event driven changes, reflects the delayed transition from Late Pleniglacial steppic assemblages to Holocene arboreal pollen associations.

The record of a mediterranean arboreal pollen assemblage before the arid-humid transition in this site and a poorly defined Younger Dryas biozone, introduce the double folded question, either about the validity of our understanding of the Western Mediterranean vegetation of the Late Pleniglacial, or about the actual consequences of the Younger Dryas climatic event on the Late-Glacial vegetation of these regions.