Abstract
Benthic foraminiferal associations from messinian marly-diatomeous series in the Nador-Melilla basin (North eastern Morocco). The study of the benthic foraminiferal of the three sampled marly diatomeous series of the Nador-Melilla (north eastern Morocco) allows to identify 97 species, dominated especially by Bolivinidae and Buliminidae. The qualitative and quantitative analysis of this microfauna reveals a paleoenvironment with low oxygen concentrations and rich in nutrients in the bottom waters, linked to the functioning of upwellings. It is characterized by a low microfaunal diversity and a weak pelagism index, and by the dominance of Bolivinidae (Bolivina spathulata, B. dentellata, B. dilatata) and Buliminidae (Bulimina aculeata, B. elongata, B. echinata). This paleoenvironment is disturbed by periods of reoxigenation characterized by pelagism index and benthic foraminifera diversity relatively raised and sometimes by the abundant presence of the bivalve Neopycnodonta navicularis.
Published Version
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