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Trends in grain size measures of the quaternary sediments off the vengurla coast maharashtra india with reference to beach morphology and tectonic evolution


Journal of the Geological Society of India 27(5): 419-427
Trends in grain size measures of the quaternary sediments off the vengurla coast maharashtra india with reference to beach morphology and tectonic evolution
Field studies along the coast of Vengurla, Maharashtra, reveal presence of stabilised dunes, older and younger raised beaches apart from the present intertidal zone. From these geomorphic features, a fall in sea-level to the extent of about 4 m and 1 m during the Holocene period is suggested. The sediments constituting these geomorphic features have been examined for their grain-size characteristics. Statistical parameters, such as: mean size, standard deviation and skewness have been compared from each geomorphic unit. The comparison indicates reversals in their trends of variation, which have been ascribed to transgressional cycles. It is suggested that tectonic control, which operated either through a relative fall in sea-level or an emergence of the Indian shield during the Holocene period is responsible for the accretionary nature of the beach.

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Accession: 006839383



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