الفهرس 
CONTENTSOnly 14 pages are availabe for public view
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Abstract
The studied interval in the N. El Faras-1X Well is made up of three lithostratigraphic units arranged from the top to base as the upper part of Apollonia, the Dabaa and the lower part Moghra formations. The detailed investigation of these assemblages has led to the recognition of 77 species of planktonic foraminifera, 107 benthic foraminiferal species and 57 of the ostracod species among of them two new species. Twelve planktic foraminiferal biozones were recorded and arranged from the oldest Morozovelloides crassatus Zone (E13) to the youngest Trilobatus primordius Subzone (M1a). Seven ostracod biozones were recorded and arranged from the oldest Cyprideis qattaraensis Zone (Z1) to the youngest Grinioneis haidingeri Zone (Z7). Four boundaries were recorded (from upper Bartonian to Aquitanian boundary). The quantitative analyses of the recorded foraminifera enable the interpretation of paleoecology, paleobathymetry and sea-level changes during the Bartonian-Aquitanian succession. These analyses are based on the study of the different foraminiferal parameters such as Total foraminiferal number (TFN), species richness (SR), Planktic/Benthic ratio (P/B Ratio), Agglutinated/Calcareous ratio, Epifaunal/Infaunal ratio, Triangular plot for shell types ratio, Index of oceanity, Fisher alpha index and Benthic foraminiferal assemblage. These analyses revel that the limestone of the upper part of the Apollonia Formation is distinguished by oscillating paleobathymetry from middle to outer neritic with general rise of the sea level and deposition above CCD, oxygenated environments (mesotrophic conditions) and normal salinity. The shale of the Dabaa Formation is characterized by paleobathymetry fluctuating from inner to outer neritic with general fall and rise of the sea level and deposition above CCD, oxygenated to well oxygenated environments (oligotrophic-mesotrophic conditions) and normal salinity. The lower part of the Moghra Formation is characterized by paleobathymetry oscillate from inner to middle neritic with general fall of sea level, deposition above CCD, well oxygenated environments (oligotrophic conditions) and normal salinity.