%0 Journal Article %T The origin of black shale-hosted Mn deposits in Paratethyan basins: Constraints from geological events at the Eocene/Oligocene boundary %A Varentsov, I.M. %A Muzyliov, N.G. %A Nikolaev, V.G. %A Stupin, S.I. %K Paratethyan basins, Mn deposits, Eocene/Oligocene boundary, geological events. %J Russian Journal of Earth Sciences %D 2003 %N 5 %P 17 %I Geophysical Center of the Russian Academy of Sciences