grain size distribution and depositional environment of coastal sediments at ponnaiyar and gadilam estuary, east coast of india

Grain size distributions of vertical sediments are generally reveals medium to fine grained nature of sediments. The standard deviation (δ1) indicates that the samples are well sorted nature. The graphic skewness (ski) indicates that they are near symmetrical and fine skewed. The kurtosis (Kg) values of the sediments vary in leptokurtic nature. All the samples show marginal marine conditions. During this period the sediments were deposited predominantly by Aeolian and beach process under shallow agitating environment and carried by turbidity action. The significance of the present study is mainly focused on vertical size distribution, depositional process, environments and energy conditions of the deposits.