in the Central Indian Basin (CIB). Twenty-six surface sediments and a spade core (37 cm
long) from the CIB were examined for the presence of volcanogenic-hydrothermal materials
(vhm). High concentrations of vhm were discovered in a grab and the core top—both located
at the base of an intraplate seamount. The vhm consist of ochrous metalliferous sediments,
volcanic spherules and glass shards. The radiolaria associated with the vhm suggest a∼ 10 …