Les foraminifères planctoniques du Néogène du bassin de Boudinar (Rif nord-oriental, Maroc)‎. Biostratigraphie, systématique et paléoécologie

Abstract : The planktonic foraminifers from the Neogene series of the Boudinar basin (northeast of Morocco) show both high specific diversity and numerical abundance and specific have therefore good potential for biostratigraphical, palaeoecological and systematic studies. 64 species have been recognized, the systematic description of all the taxa is given as well as stratigraphical, distributional and ecological data. New subzones within the Neogene series tentatively introduced based on foraminifer distribution through the Neogene series of the Boudinar basin. A more accurate definition of the Tortonian - Messinian boundary and the limit between Miocene and Pliocene is proposed. Bioevents are recognized. Quantitative methods (planktonic / benthic ratio) were used together with through morphological studies. The distribution of planktonic foraminifers seems to have much controlled by the water depth, the temperature and the salinity. Detailed studies from selected profiles hitting the basin indicate significant variation in the thickness of the water column during the Messinian times. Palaeogeographical implications are tested against current models proposed for the Neogene of the Mediterranean regions.
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Nadia Barhoun. Les foraminifères planctoniques du Néogène du bassin de Boudinar (Rif nord-oriental, Maroc)‎. Biostratigraphie, systématique et paléoécologie. Sciences de la Terre. Université Claude Bernard Lyon 1, 1991. Français. ⟨tel-01998644v2⟩

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