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One of the world's largest river islands — built, moved and eroded by the restless Brahmaputra.

Majuli is one of the largest river islands in the world, a broad expanse of land held within the braided channels of the mighty Brahmaputra in Assam. Unlike a mountain or a craton, it is a young and impermanent landform: built entirely of river-borne sand and silt, and constantly reshaped as the Brahmaputra shifts its course.

That same restlessness makes it fragile. The island has been losing land to erosion as the river eats at its banks — a vivid, ongoing example of how quickly moving water can both create and destroy geography.

Sources

• Geological Survey of India

A short reference note: this summary draws on third-party sources such as the Geological Survey of India and Wikipedia. In time I plan to give every geological feature its own learning-oriented write-up — with custom diagrams, graphs, and study pointers — as I’ve already done for the 11 locations that have an Instagram reel.