Calcareous nannoplankton and the upper Tithonian – Berriasian magnetostratigraphy in Theodosiaarea, the east Crimea

Abstract

This is the description of nannoplankton assemblages for the first time reported from the upper Tithonian - Berriasian sequences in Theodosia area of East Crimea. Relationships between nannoplankton assemblages and magnetic zones are examined. Close characteristics of the lowermost parts of the Grandis ammonite subzone, NKT nannoplankton zone and M18r magnetic zone serve as the basis for the authors to offer the base of Grandis subzone to be the Tithonian - Berriasian boundary.Fil: Arkadiev, V.. Saint Petersburg State University; RusiaFil: Lescano, Marina Aurora. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Estudios Andinos "Don Pablo Groeber". Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Estudios Andinos "Don Pablo Groeber"; ArgentinaFil: Concheyro, Graciela. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Estudios Andinos "Don Pablo Groeber". Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Estudios Andinos "Don Pablo Groeber"; ArgentinaFil: Guzhikov, A.. Saratov State University; RusiaFil: Baraboshkin, E.. Moscow State University; Rusia10th All-Russia MeetingMagadanRusiaInterdepartmental Stratigraphic CommitteeRussian Foundation for Basic ResearchMinistry of Science and Higher Education of Russi