Foraminifera of the Eptahorion Formation (early Oligocene) of the Mesohellenic Basin, northern Greece

Abstract. Planktonic and benthic foraminifera from the type area of the early Oligocene Eptahorion Formation (Mesohellenic Basin, northern Greece) have been ranged and partly described and figured. Altogether, about 130 taxa were identified. According to the current age assignments, the formation is attributable to Blow’s Zones P20 and P21. The record of benthic palaeoecologic indices has thrown light on bathymetric history of the formation. The deposition of the whole sequence, after the initial transgressive phase, occured in a marine, relatively deep environment. Palaeontologic evidence indicates few changes, ranging from the epibathyal to the outer neritic bathymetric domain.