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North Gujarat Rivers: Remnants of a Super Fluvial System
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A thickness of over 300 m of dominantly alluvial sediments in the north Gujarat plains suggest that the sedimentation took place during the late Quaternary period in a huge graben bounded by faults that are related to the Cambay basin. An ancient super fluvial system was responsible for this vast accumulation. Most of the present day rivers are the remnants of that former system and have exposed the sediments in cliff sections. The present course of the Sabarmati appears to be unrelated to the former system for much of its length. Its course is controlled by a major lineament that developed subsequent to the deposition of the entire sequence. The earlier course of the river is now represented by the river Rupen. The uplift of the Aravallis during the Mid-Late Quaternary and the eustatic sea level changes might have disrupted the older system.
Keywords
Geomorphology, Quaternary, Sedimentation, Cambay Basin, Gujarat.
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