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Geological Formations

Doab

Sedimentary and Stratigraphic Formations

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A doab is the tract of land lying between two converging rivers, common across the Indian subcontinent, formed by the alluvial deposits those rivers lay down: the land nearest the rivers is low-lying floodplain called khadir, while the higher ground farther from the channels is the less fertile bangar. The largest is the Ganga-Yamuna Doab, roughly 23,360 square miles running from the Sivalik Hills to Prayagraj, and Punjab holds five more, the Sind Sagar, Chaj, Rachna, Bari and Bist doabs, each named for the rivers bounding it.

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