Age
Geological Survey of India (GSI) carried out a special programme called “Project Rameswaram” that concluded that age data of corals indicate that the Rameswaram island has evolved since 125,000 years ago. Radiocarbon dating of samples in this study suggests that the domain between Rameswaram and Talaimannar may have thus been exposed around 18,000 years ago. Thermoluminescence dating by GSI concludes that the sand dunes of Dhanushkodi to Adam's bridge started forming only about 500–600 years ago.
Investigation by Centre for Remote Sensing (CRS) of Bharathidasan University, Tiruchi, led by Professor S.M. Ramasamy dates the structure to 3,500 years. In the same study, carbon dating of some ancient beaches between Thiruthuraipoondi and Kodiyakarai shows the Thiruthuraipoondi beach dates back to 6,000 years and Kodiyakarai around 1,100 years ago. Another study suggests that the appearance of the reefs and other evidence indicate their recency, and a coral sample gives a radiocarbon age of 4020±160 years BP
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