RUSSIAN JOURNAL OF EARTH SCIENCES VOL. 5, NO. 4, PAGES 255–272, doi:10.2205/2003ES000129, 2003

The origin of black shale-hosted Mn deposits in Paratethyan basins: Constraints from geological events at the Eocene/Oligocene boundary

I. M. Varentsov, N. G. Muzyliov, V. G. Nikolaev, and S. I. Stupin

Geological Institute of the Russian Academy of Sciences, Moscow, Russia