title: Tirnovella occitanica Zone of the Berriasian in the Feodosia region (Eastern Crimea)
abstract: For the first time during the last 100 years, the presence of Tirnovella occitanica ammonite Zone in the Berriasian section of Feodosia was confirmed. The results of sedimentological, bio- and magnetostratigraphic study of this interval are discussed in the paper.
journal: Moscow University Bulletin Series 4 Geology