Up to present zonal division of Cretaceous sediments of the Western Carpathians of Slovakia on the basis of planktonic foraminifers is synthetic. In the Lower Cretaceous, when also are continuous profiles, the predominating facies are limestones. In the Kostolec sequence the layers of marls present from the Hauterivian permit division of the Hauterivian–Aptian on the basis of planktonic foraminifers. In the Czorsztyn sequence it is the Albian–Lower Campanian rich in planktonic foraminifers, in the Pieninic sequences from the Aptian to the Turonian. In the Periklippen zone was continuous sedimentation to the Upper Paleocene, but development of planktonic foraminifers in this zone was affected by several negative factors. In the first place it was formation of an archipelago zone in the Middle Albian–Turonian and Coniacian–Lower Santonian (Salaj 1990a). Further on, sedimentation of prevailingly detrital sediments in these intervals sections, equally as also their shallow-water character and overheating of water masses (development of corals, hippurites, bryozoans a.o.) also in adjacent deeper zones with flysch sedimentation. Besides overheated surface waters, the proximity of continents, higher contamination of water by turbidity washings of detrital material adjacent slopes of cordiller zones and continents were of unfavourable influence on planktonic foraminifers.