Climate of the Past Discussions www.clim-past-discuss.net 1814-9340 1814-9359 6 4 2010 10.5194/cpd-6-1311-2010 http://www.clim-past-discuss.net/6/1311/2010/ http://www.clim-past-discuss.net/6/1311/2010/cpd-6-1311-2010.html http://www.clim-past-discuss.net/6/1311/2010/cpd-6-1311-2010.pdf 1311 1335 2010-07-09 A ~400 ka supra-Milankovitch cycle in the Na, Mg, Pb, Ni, and Co records of a ferromanganese crust from the Vityaz fracture zone, central Indian ridge R. Banerjee banerjee@nio.org S. M. Gupta H. Miura D. V. Borole Geological Oceanography Division, National Institute of oceanography, CSIR, Dona Paula, Goa 403 004, India Department of Natural History Sciences, Graduate School of Science, Hokkaido University, Sapporo 060-0810, Japan A ~400 ka (kilo years) supra-Milankovitch cycle, recorded in the sodium, magnesium, lead, nickel and cobalt contents of a 32 mm thick ferromanganese crust from Vityaz fracture zone, central Indian ridge is reported here. 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