Effect of Uplift and Structure on Drainage in the Southern Part of Cuddapah Basin
Authors
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Department of Geology, Andhra University, Waltair
R. Vaidyanadhan
Abstract
A study of the nature of the basal sediments of the Cuddapah System and their position in space with respect to the Archaeans has resulted in the understanding of the probable original extent of the Cuddapah sea in the south, and the uplift which the southern part of the basin might have experienced. It is suggested that the faults along the Archaean-Cuddapah boundary in the south and south-west, and some within the basin affecting the Lower Cuddapah rocks, are due to these gradual uplifts of the south-eastern part of the basin, which range in time from post-Lower Cuddapah to pre-Tertiary.
Evidences are adduced to show that the pattern of major river development in the southern part of the basin is not due to either transverse subsequent drainage, or progressive piracy or antecedence, but is due to superposition (or superimposition) on a structural plain of the Kurnools, about 3,000 feet above mean sea level, over the south-western part of the basin and gradual lowering of the rivers since Tertiary times. The effect on the rivers due to oscillations of sea level during the Pleistocene is also shown.
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References
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