Abstract
Chemical, mineralogical and smear slide analyses of marine sediments from the eastern Indian Ocean have revealed at least eight sediment groups in the region. The Bay of Bengal contains sediments derived from the Himalayan Range, Indian subcontinent, Sri Lanka and West Burma. Sediments from the Indian subcontinent are carried south, passing the eastern abyssal plain of Sri Lanka and then turn west. This sediment path can be identified by A1, Fe and smectite distributions. The principal sediment source to the Andaman Sea is the Irrawaddy River. In the Central Indian and Wharton Basins, hydrogenous sediments contain additional material slumped from Java and Sumatra and wind blown from western Australia.
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