The dissertation presents the results of the study and analysis of the systematic composition of foraminiferal complexes in the Upper Cretaceous deposits of the Northern outskirts of Donbas and the spatiotemporal regularities of their stratigraphic distribution are clarified.
For the first time, a zonal scale for benthic foraminifers with 17 zones has been developed for this region, which is consistent with the zonal scheme for macrofauna. The zonal division by foraminifers for the Eastern European platform has been clarified. The established foraminiferal zones were correlated with the same zones of adjacent territories. The correspondence of certain species of foraminifers with boreal zonal markers of the International Stratigraphic Scale was found (2008).
To solve paleontological and stratigraphic problems of the Upper Cretaceous sequence of the Northern outskirts of Donbas, the systematic composition of foraminifers in the consolidated section of the Upper Cretaceous of this region (from the Cenomanian to the Maastrichtian inclusive) had been studied. It was determined that taxonomic diversity is being represented by 323 species of foraminifers belonging to 88 genera and 23 families. Of these, for the first time for the Northern outskirts of Donbas, 17 species (index species and characteristical species of foraminiferal zones) identified for the study area had been monographically described.
A paleontological atlas of images (6 phototables) of 78 characteristic species of Upper Cretaceous foraminifers of the Northern outskirts of Donbas was compiled.
For the first time, a biostratigraphic scale for benthic foraminifers had been developed for the deposits of the Upper Cretaceous of the Northern outskirts of Donbas, in which 17 foraminiferal zones, 18 subzones were identified. Their correspondence to the substages and to the svites.
Micro-paleontological studies were carried out, based on the results of which the following had been done. The biostratigraphic characteristics of the Cenomanian, Turonian, Сoniacian, Santonian, Campanian and Maastrichtian deposits of the studied region are supplemented for foraminifers.
For the first time, according to foraminifers, the age of calcareous sandstones (Glafirivka village, Luhansk region) – the Lower Turonian, which was previously considered Upper Senomanian, had been substantiated. The age of the Sydorivskoy svite had been specified, its lower part (Sentyanivska, Tarasivska, Rosalynivska subsvits) was assigned to the Middle Campanian since the author identified the middle substage in the volume of the Brotzenella monterelensis foraminiferal zone of the Northern outskirts of Donbas.
On the basis of new materials, it is proposed to supplement the current Stratigraphic scheme of Upper Cretaceous deposits of the Northern outskirts of Donbas (2013) with a zonal scale for benthic foraminifers. A continuous section of the Turonian-Lower Сoniacian deposits was revealed (Berezivsky quarry, Lysychansk, Lugansk region), now there is a break in the Lower Turonian in the stratigraphic scheme. According to the results of the study of the Upper Maastrichtian deposits (Shandrygolovo village, Donetsk region and Kupyanska the bore hole №1, Pidvyske village, Kharkov region), the foraminiferal zone Hanzawaia ekblomi was determined, the presence of deposits of the Upper Maastrichtian had been proved, they are now absent in the stratigraphic scheme.
