Mainly pe lagic/hemipelagic de pos its of the Vezhany Nappe (Paleocene-low er most Oligocene Metova For ma tion with a high con tent of plank tonic foraminifera) and typ i cal flysch de pos its of the Monastyrets Nappe (Paleocene-Eocene Sushmanets For ma tion with com mon ag glu ti nated foraminifera as well as the Eocene Drahovo For ma tion), of the south west ern in ner part of the Ukrai nian Carpathians have been stud ied. The Parvularugoglobigerina eugubina Zone (Lower Danian), Acarinina acarinata Zone (Up per Thanetian), Morozovella subbotinae Zone and Morozovella aragonensis Zone (Ypresian), Acarinina bullbrooki Zone and Acarinina rotundimarginata Zone (Lutetian), Subbotina corpulenta Zone and Subbotina vialovi Zone (Up per Priabonian-Lower Rupelian) based on plank tonic foraminifera as well as the Rzehakina fissistomata sensu lato Zone (Paleocene), Glomospira charoides-Recurvoides smugarensis Zone (Ypresian), and an as sem blage with Haplophragmoides parvulus (lat est Mid dle Eocene-early Late Eocene) based on ag glu ti nated foraminifera have been iden ti fied in these de pos its. The deep-wa ter ag glu ti nated foraminifera of the "Rzehakina", "Rhabdammina" and "Paratro chamminoides" assem blages found in the typ i cal flysch de pos its of the Sushmanets For ma tion in di cate lower slope to abys sal en vi ron ments be low the CCD. The ge neric com po si tion and mor pho log i cal fea tures of plank tonic and ben thic foraminifera re cov ered from marls of the Metova For ma tion sug gest pe lagic/hemipelagic con di tions at bathyal depths above the foraminiferal lysocline.

For the first time in the Ukrainian Carpathians, the depths and tectono-sedimentation processes in the north-eastern part of the Outer Carpathian Basin (Skyba and Boryslav-Pokuttya units) have been restored on the base of sedimentological and microfaunistic studies. It was established that in the Cretaceous-Eocene time, the deep-water (near Calcite Compensation Depth) turbidite and similar sedimentation (turbidites with Bouma textures, grainites, debris-flow deposits), which periodically alternated with (hemi)pelagic sedimentation (red, green and black shales) was dominant here. Sedimentation took place on the continental margin of the the Carpathian branch of the Tethys, where deep-water fans were formed. Cretaceous-Eocene background red and green shales are enriched in buried in situ benthic foraminifera which are similar in taxonomic composition and morphological features to the microfauna of the Carpathian-Alpine and Atlantic regions (deep-water agglutinated foraminifera), which indicate lower bathyal – abyssal depths of flysch sedimentation. Latest Eocene Globigerina Marl horizon contains the foraminiferal assemblage with plankton dominance, which indicates a general shallowing of the Outer Carpathian Basin (middle-upper bathyal conditions above a calcite compensation depth). Oligocene – lowermost Miocene Menilite-Krosno and Polyanytsia formations were accumulated in the Skyba and Boryslav-Pokuttya sub-basins. In the Miocene, shallow-water molasses were accumulated here. Probably, the tectonic uproot of flysch deposits from its substrate and their synsedymentary thrusting towards the platform caused a significant shallowing of the Skyba and Boryslav-Pokuttya sub-basins starting from the latest Eocene. These processes reflected the growth of the Carpathian frontal nappes at the final orogen formation stage.

In the Ukrai nian part of the Silesian Nappe (Outer Carpathians, Uzh River Basin) the ex otic clast-bear ing Uzhok Olistostrome (up to 60 m thick) oc curs within the Oligocene Krosno For ma tion and un der lies the Pikui Sand stone (Otryt Sand stone in Poland). The Uzhok Olistostrome con sists of de bris/grain/mud flow de pos its with clasts of schist and bioclastic lime stone. These de pos its con tain re de pos ited pe lagic sed i ments with plank tonic foraminifers in clud ing Parogloborotalia pseudocontinuosa (Jenkins), Ciperoella ciperoensis (Bolli), Globoturborotalita woodi (Jenkins), Chiloguembelina adriatica Premec Fucek, Hernitz Kucenjak and Huber. The age of the Uzhok Olistostrome based on plank tonic foraminifers cor re lates with the mid dle Oligocene within the mid dle O2-O5 zones. The source area for the Uzhok Olistostrome and Pikui Sand stone was a mid-Oligocene intrabasinal palaeouplift (the Pikui Ridge) in ter preted as the fore-bulge lo cated in the Silesian Sub-basin ahead the emerg ing Outer Carpathian accretionary prism (in clud ing the Dukla Nappe and other West Carpathian in ner flysch nappes).

In Ukraine, the perspective oil and gas bearing regions are located within the Carpathian-Black Sea segment of the Tethys, and the southern slopes of the East European Platform. We examined the plankton microfossil content from numerous Paleogene samples obtained from outcrop and exploration borehole sections. The interpretation of the large dataset concerning the spatial-temporal distribution of Foraminifera, Calcareous nannofossils and Dinocysts is provided. The characteristics of the stratigraphic distribution of planktonic fossil assemblages in the Paleogene sections, their cyclicity in the formations and the specifics of the zonal subdivision based on the defined correlation levels are given. As a result of an integrated study the biozonal subdivision of Paleogene sediments of Ukraine is substantiated, and an interregional correlation of various facies of the Paleogene sections with the International Stratigraphic Scheme is undertaken.На території України перспективними нафтогазоносними регіонами є Карпато-Чорноморський сегмент Тетиса та Південні схили Східноєвропейської платформи. Авторами особисто досліджено планктонні мікрофосилії з численних розрізів палеогенових відкладів у відслоненнях і розкритих пошуково-розвідувальними та параметричними свердловинами. Опрацьовано значну інформацію щодо просторово-часового розподілу форамініфер, нанопланктону і диноцист в палеогені, на підставі чого встановлено закономірності та особливості стратиграфічної приуроченості планктонних асоціацій викопних решток в палеогенових розрізах, їх циклічність у формаційних комплексах. Викладено специфіку біозонального розподілу за встановленими кореляційними рівнями. В результаті комплексних досліджень обґрунтовано зональний поділ палеогенових відкладів України, виконано міжрегіональну кореляцію різнофаціальних палеогенових розрізів і кореляцію з Міжнародною стратиграфічною шкалою. Ключові слова: форамініфери, нанопланктон, диноцисти, зональна шкала, кореляція, палеоген, Україна.

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