Palaeoenvironmental reconstruction of the Oligocene Afales Basin, Ithaki island, western Greece

摘要: Assemblages of benthic foraminifera from one clastic succession in the Afales Basin (Ithaki Island, western Greece) were investigated to reconstruct palaeoenvironmental conditions during Oligocene. The section consists alternating hemipelagic marls and detrital deposits, designated as flysch-like beds, attributed biostratigraphic Zones P20 P21. Planktic percentages are mostly high (66–80%). Benthic foraminiferal assemblages comprise calcareous agglutinated taxa (up 15%). prevalence epifaunal indicates good ventilation bottom water resulting basin morphology, which enabled undisturbed flow throughout basin. Palaeodepth estimates imply bathyal deposition, about 800 1200 m deep. fauna is diversity along section, expected deep marine environments. abundances most common (Cibicidoides spp., Oridorsalis umbonatus, Gyroidinoides Stilostomella Nodosariidae, Nuttallides umbonifera) quite variable generally oligotrophic mesotrophic environmental with organic flux.