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Point Bar Complex of an Exhumed Channel in Upland Interfluve of the Ganga Plain, India
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Facies architecture and evolutionary history of a point bar complex of exhumed channel on the upland interfluve surface of the Ganga Plain is presented. The point bar complex is made up of four distinctive sequences, each characterized by a specific lithofacies association and grain size, where successive sequence shows decrease in grain size and reduced channel width denoting reduction in the discharge of the channel. The top of each sequence represents a hiatus surface marked by dense bioturbation. The flow in the exhumed channel was towards south and southwest. At the end of the deposition of third sequence neotectonic activity caused uplift, tilting of the surface and disruption of the river channel. A facies model of such deposits is proposed.
Keywords
Point Bar Complex, Fluvial, Ganga Plain, Palaeocurrent, Indo-Gangetic Alluvium.
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