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Following the rise to present sea levels during the Holocene, by around 7,000 years ago, the strait became submerged. [4] The waves around it, to its north and south are of high contrast. To the north, the waves in the Bay of Bengal are mostly swells while that on the south, in the Palk Bay, the waves are mostly smaller wind waves. [5]
Located on the southeastern tip of the subcontinent, the Gulf of Mannar is known to harbour over 3,600 species of flora and fauna, making it one of the richest coastal regions in Asia. Around 117 hard coral species have been recorded in the Gulf of Mannar. Sea turtles are frequent visitors to the gulf as are sharks, dugongs, and dolphins.
The Palk Strait Bridge is a proposed road and rail sea bridge and tunnel that would cross the Palk Strait roughly over, or parallel to, Adam's Bridge. It would span from Dhanushkodi at the tip of Pamban Island in India, to Talaimannar on Mannar Island in Sri Lanka, and would be used for both industrial/economic purposes and to boost tourism.
Rama's Bridge, a shoal "connecting" (northwestern) Sri Lanka (Talaimannar on Mannar island in that district) and (southern) India (Dhanushkodi (extinct)/Rameswaram in Ramanathapuram District) between the Gulf of Mannar (southwest) from the Palk Strait (northeast). A coastal belt about thirty meters above sea level surrounds the island. [6]
Bathymetry of Palk Bay developed by interpolation of National Hydrographic datasets. Palk Bay is a semi-enclosed shallow water body between the southeast coast of India and Sri Lanka, with a water depth maximum of 13 m. [1] Palk Bay is located between 8° 50′ and 10° North latitudes and 78° 50′ and 80° 30′ East longitudes. [1]
This is a list of places on land below mean sea level. Places artificially created such as tunnels, mines, basements, and dug holes, or places under water, or existing temporarily as a result of ebbing of sea tide etc., are not included. Places where seawater and rainwater is pumped away are included.
Sri Lanka is separated from the mainland portion of the Indian subcontinent by the Gulf of Mannar and Palk Strait. According to Hindu mythology, a land bridge existed between the Indian mainland and Sri Lanka. It now amounts to only a chain of limestone shoals remaining above sea level. [171]
The channel would be dredged in the Sethusamudram sea between Tamil Nadu and Sri Lanka, passing through the limestone shoals of Rama Sethu. The project involves digging a 44.9-nautical-mile (51.7 mi; 83.2 km) long deepwater channel linking the shallow Palk Strait with the Gulf of Mannar.