title: TO THE BIOSTRATIGRAPHY OF TARCHANIAN-CHOKRAKIAN DEPOSITS OF THE CRIMEAN-CAUCASIAN REGIONS
abstract: Analysis of vertical distribution of rather rich paleontological material (mollusks, foraminifers, ostracods, nannoplankton) from the Tarchanian and Chokrakian deposits of the Kerch Peninsula and Georgia have enabled us to share the opinion of the researchers considering that in the Eastern Paratethys in spirialis clays four stratigraphic levels (Upper Tarchanian, Lower, Middle and Upper Сhokrakian) are recorded.
journal: Collection of Scientific Works of the Institute of Geological Sciences of the NAS of Ukraine