Instead of the isotopes Jo, Th, and Pa the radioactive daughter products Rn, Tn, and An were measured. It was possible to date four cores and to calculate the sedimentation rates. A rough estimation of the sedimentation in the northern part of the Indian Ocean can be given. In the middle part, the sedimentation rate is s = 0.32 cm/103 years, and near Africa and near India this rate increases to values of about2 cm/103 years.

Supplement to: Heye, D (1970): Bestimmung der Sedimentationsrate nach der Jo/Th- und Pa/Jo-Methode an Sedimenten des Indischen Ozeans. Meteor Forschungsergebnisse, Deutsche Forschungsgemeinschaft, Reihe C Geologie und Geophysik, Gebrüder Bornträger, Berlin, Stuttgart, C3, 15-22