Publication of Geophysical Center RAS RUSSIAN JOURNAL OF EARTH SCIENCES, VOL. 21, ES4006, doi:10.2205/2021ES000762, 2021 Biostratigraphical investigation of calcareous nannofossils: The middle Paleogene to early Neogene strata from the eastern parts of Iran (Median Tethys sea-way)Darestani, Mina Ghavidel, Fatemeh Hadavi, Mohammad Parandavar, and Ahmad Reza Khazaei |