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Ramasetu and neighbouring areas like Rameswaram, Dhanushkodi, Devipattinam and Thirupullani are mentioned in the context of various legends in Ramayana.
Considerable diversity of opinion and confusion exists about the nature and origin of this structure.
The channel is expected to cut over 400 km (nearly 30 hours of shipping time) off the voyage around the island of Sri Lanka.
This proposed channel's current alignment requires dredging through Adam's Bridge.
The lack of comprehensive field studies explains many of the uncertainties regarding the nature and origin of Adam's Bridge, which mostly consists of a series of parallel ledges of sandstone and conglomerates that are hard at the surface and grow coarse and soft as they descend to sandy banks. One account mentions that this landform was formerly the world's largest tombolo that split into a chain of shoals by a slight rise in mean sea level a few thousand years ago.
In 2005, the Government of India approved a multi-million dollar Sethusamudram Shipping Canal Project that aims to create a ship channel across the Palk Strait by dredging the shallow ocean floor near Dhanushkodi.
is a chain of limestone shoals, between Pamban Island, also known as Rameswaram Island, off the south-eastern coast of Tamil Nadu, India, and Mannar Island, off the north-western coast of Sri Lanka.
Geological evidence suggests that this bridge is a former land connection between India and Sri Lanka.
The feature consists of the reef crest (flattened, emergent, especially during low tides, or nearly emergent segment of a reef), sand cays (accumulations of loose coral sands and beach rock) and intermittent deep channels.
The coral reefs are variously designated by other studies as ribbon and atoll reefs.