Micropaleontological contribution (foraminifera) to biostratigraphy and palaeoenvironmental reconstruction (Gharb Basin, Neogene, Morocco).
To specify the palaeoenvironmental framework both micropaleontological analysis and sedimentological studies were undertaken from boreholes in the Neogene of the Gharb basin (Morocco). Microfacies examination discloses an alternation of three deposits types. They are rich in planktic foraminifera which give evidence of basin influences. Foraminifera systematic analysis (about seventy taxa) highlights eight biostratigraphic bioevents and allows to precise the biostratigraphy. Among benthic foraminifera, Anomalinoidae, Cibicidae and Buliminae are the most representative families. The qualitative and quantitative evolution of benthonic and planktonic foraminifera populational parameters provides precise details about palaeoenvironmental conditions (palaeobathymetry, bottom constitution, dissolved oxygen). This accurate micropalaeontological study allows to precise (1) the biostratigraphic framework on one hand, (2) the environments succession that facies analysis doesn't disclose on the other hand.
AAPG Datapages/Search and Discovery Article #90226 © 2015 European Regional Conference and Exhibition, Lisbon, Portugal, May 18-19, 2015