Bengal Fan

[2] Turbidity currents have transported the sediment through a series of submarine canyons, some of which are more than 1,500 miles (2,414 km) in length, to be deposited in the Bay of Bengal up to 30 degrees latitude from where it began.

To date, the oldest sediments recovered from the Bengal fan are from Early Miocene age.

[3] Their mineralogical and geochemical characteristics confirm their Himalayan origin and demonstrate that the Himalaya was already a major mountain range 20 million years ago.

[5] It is bordered to the west by the continental slope of eastern India, to the north by the continental slope of Bangladesh and to east by the northern part of Sunda Trench off Myanmar and the Andaman Islands, the accretionary wedge associated with subduction of the Indo-Australian Plate beneath the Sunda Plate and continues along the west side of the Ninety East Ridge.

[6][7] A deep sea canyon called Swatch of No Ground (SoNG) is located south of Sundarbans National Park and the island of Dublar Char.