Page "Andaman Sea" Paragraph 9
from
Wikipedia
The northern and eastern parts are shallower than 180 meters ( 600 ft ) due to the silt deposited by the Irrawaddy River.
Less than 5 % of the sea is deeper than 3, 000 meters ( 10, 000 ft ), and in a system of submarine valleys east of the Andaman-Nicobar Ridge, the depth exceeds 4, 000 meters ( 13, 200 ft ).
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