Grain size analysis and characterization of sedimentary environment along manakudy estuary, Tamil nadu, India

Grain size analysis of Manakudy estuary around mangrove forest , Tamil Nadu, India has been studied and textural parameters namely mean, sorting, skewness and kurtosis. Textural pattern shows complicated profile as a result of the fluctuation in the physicochemical conditions due to the sediments and the marine interactions. Abundance of the medium sand to fine sand shows the prevalence of comparatively moderate- to low-energy condition in the Mankudy mangrove area. In monsoon the abundance of fine sand shows high energy condition. LDF results show the dominance of shallow marine deposits in the Aeolian beach and the influence of turbidity. The granulometric and CM pattern indicates most of the grains from by bottom suspension rolling to graded suspension condition. The comparison with the tractive current diagram, all the season fall in tractive current environment, that is by interaction with wave actions.