Qualla: Adam's Bridge

Adam's Bridge: Introduction

Wed, 11 Mar 2026 00:00:00 GMT

Photo credit George Victor (UU), CC BY-SA 4.0. From satellite orbit, it looks deliberate. A 48-kilometer arc of limestone shoals connecting India's Pamban Island to Sri Lanka's Mannar Island, curving across the turquoise shallows of the Palk Strait with an almost architectural precision. The water here rarely exceeds one meter in depth, and in places the shoals break the surface entirely, so that what you see from above is neither land nor sea but something stubbornly in between. For geologists, Adam's Bridge is a natural formation shaped by ice ages, sea-level shifts, and coral growth over tens of thousands of years. For millions of Hindus, it is Rama Setu, the causeway that Lord Rama and his army of Vanaras built stone by stone to cross the sea and rescue Sita from the demon-king Ravana. Both stories are about the same stripe of reef and sand. Neither has fully yielded to the other.

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Image: George Victor (UU) | CC BY-SA 4.0

Adam's Bridge: Where the Ice Ages Left Their Mark

Wed, 11 Mar 2026 00:00:00 GMT

Photo credit CarneDiem, CC BY-SA 4.0. During the Last Glacial Period, when sea levels dropped as much as 120 meters below their present values, the entire Palk Strait was dry land. You could have walked from the Indian subcontinent to Sri Lanka. As temperatures rose during the Holocene, the strait flooded, submerging...

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Image: CarneDiem | CC BY-SA 4.0

Adam's Bridge: The Bridge of the Ramayana

Wed, 11 Mar 2026 00:00:00 GMT

Photo credit George Victor (UU), CC BY-SA 4.0. The ancient Sanskrit epic Ramayana describes how Rama, aided by an army of Vanaras, constructed a bridge to reach the island of Lanka and rescue his wife Sita from the demon-king Ravana. In popular belief, Lanka is equated with present-day Sri Lanka, and the chain of shoals is th...

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Image: George Victor (UU) | CC BY-SA 4.0

Adam's Bridge: Centuries of Navigators and Dredges

Wed, 11 Mar 2026 00:00:00 GMT

Photo credit George Victor (UU), CC BY-SA 4.0. The shoals that give Adam's Bridge its spiritual significance have been a navigational headache for centuries. In the late 18th century, the British geographer James Rennell surveyed the area and suggested dredging a navigable passage, but his proposal was dismissed because he wa...

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Image: George Victor (UU) | CC BY-SA 4.0

Adam's Bridge: A Canal and a Collision of Values

Wed, 11 Mar 2026 00:00:00 GMT

Photo credit George Victor (UU), CC BY-SA 4.0. In 2005, the Indian government approved the Sethusamudram Shipping Canal Project, which would dredge through the shallow ocean floor near Dhanushkodi to create a ship channel across the Palk Strait and cut roughly 30 hours off the voyage around Sri Lanka. The proposed alignment r...

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Image: George Victor (UU) | CC BY-SA 4.0