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A storm event during the Maastrichtian in the Cauvery basin, South India

Ramkumar Mu (Department of Earth Sciences, IIT-Bombay, Powai, Mumbai)

Sedimentary structures in the Kallankurichchi Formation of the Ariyalur Group, South India have been examined with a view of assessing the depositional setting of these rocks. Of the different sedimentary structures such as cross bedding, cut and fill, etc., hummocky cross stratification is significant as it resulted from a major storm event. This paper deals with the recognized sedimentary structures, their genesis and environmental implications.

Keywords: storm event, Maastrichtian, Kallankurichchi Formation, Ariyalur Group, South India