<P> The ocean 's continental shelves are narrow , averaging 200 kilometres ( 120 mi ) in width . An exception is found off Australia 's western coast , where the shelf width exceeds 1,000 kilometres ( 620 mi ) . The average depth of the ocean is 3,890 m ( 12,762 ft ) . Its deepest point is Diamantina Deep in Diamantina Trench , at 8,047 m ( 26,401 ft ) deep ; Sunda Trench has a depth of 7,258 -- 7,725 m ( 23,812 -- 25,344 ft ) . North of 50 ° south latitude , 86 % of the main basin is covered by pelagic sediments , of which more than half is globigerina ooze . The remaining 14 % is layered with terrigenous sediments . Glacial outwash dominates the extreme southern latitudes . </P>
<P> The ocean 's continental shelves are narrow , averaging 200 kilometres ( 120 mi ) in width . An exception is found off Australia 's western coast , where the shelf width exceeds 1,000 kilometres ( 620 mi ) . The average depth of the ocean is 3,890 m ( 12,762 ft ) . Its deepest point is Diamantina Deep in Diamantina Trench , at 8,047 m ( 26,401 ft ) deep ; Sunda Trench has a depth of 7,258 -- 7,725 m ( 23,812 -- 25,344 ft ) . North of 50 ° south latitude , 86 % of the main basin is covered by pelagic sediments , of which more than half is globigerina ooze . The remaining 14 % is layered with terrigenous sediments . Glacial outwash dominates the extreme southern latitudes . </P>
the deepest place in the indian ocean is
the deepest place in the indian ocean is
Diamantina Deep in Diamantina Trench
Diamantina Deep in Diamantina Trench