BIOSTRATIGRAPHY SIGNIFICANS OF LENTICULINS (FORAMINIFERA) FOR SUBDIVISION OF THE UPPER TRIASSIC OF KOTELNYI ISLAND (NEW SIBERIAN ISLANDS)
Microfauna (Foraminifers) is important group, which are used for biostratigraphy and correlation deposits, and that is urgent for study Arctic Shelf. Distribution of the lenticulins in marina deposits of the Upper Triassic of Kotelnyi Island was under investigation. The successive change of the species of lenticulins (Lenticulina kotelnensis, Lenticulina triassica, Lenticulina septentrionalis, Lenticulina sakhaensis) in the Carnian and Norian sections was determined.