TY JOUR TI The origin of black shale-hosted Mn deposits in Paratethyan basins: Constraints from geological events at the Eocene/Oligocene boundary KW Paratethyan basins KW Mn deposits KW Eocene/Oligocene boundary KW geological events. JO Russian Journal of Earth Sciences AU , .. AU , .. AU , .. AU , .. PY 2003 IS 5 PB Геофизический центр Российской Академии Наук