Carbon dating of ram setu
Radiocarbon dating of samples in this study suggests the domain between Rameswaram and Talaimannar may have been exposed sometime between 7,000 and 18,000 years ago.Due to shallow waters, Adam's bridge presents a formidable hindrance to navigation through the Palk Strait.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.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.In 1823, Sir Arthur Cotton (then an Ensign), was assigned to survey the Pamban channel, which separates the Indian mainland from the island of Rameswaram and forms the first link of Adam's Bridge.Geological evidence indicates that a land connection bridged this in the past, and some temple records suggest that violent storms broke the link in 1480.
Some early Islamic sources refer to a mountain in Sri Lanka as Adam's Peak, (where Adam supposedly fell to earth) and described Adam as crossing from Sri Lanka to India via the bridge; leading to the name of Adam's Bridge.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.In the 19th century, two major theories were prominent in explaining the structure.
One considered it to be formed by the process of accretion and rising of the land, while the other surmised that it was established by the breaking away of Sri Lanka from the Indian mainland. Ram Mohan of the Centre of Natural Hazards and Disaster Studies of the University of Madras, "reconstruction of the geological evolution of the island chain is a challenging task and has to be carried out based on circumstantial evidence".Opposition parties demanded implementation of the Sethusamudram canal project using one of the five alternative alignments considered earlier by the Government, without damaging the structure of Adam's Bridge.