Depositional Environment Inferred from Grain Size Parameters of the Beach Sediments between False Devi Point to Kottapatnam, Andhra Pradesh Coast

Eighty-Eight sediment samples collected from different Sub-Environments along the Andhra Pradesh coast of India, between False Devi Point to Kottapatnam, were studied to understand the variations in the grain size parameters and depositional environments. The sediments are mostly fine to very Fine-Grained, very well sorted to moderately sorted, very coarsely skewed to fine skewed, platykurtic to leptokurtic in nature. Bivariate plots of textural parameters suggest that sediments are of beach origin. However, samples overlap in different environments are probably due to the influence of fluvial and aeolian action during or after the deposition of these sediments. The results of linear discriminant function analysis indicate the influence of littoral, shallow agitated marine and fluvial depositional environmental conditions. The C M pattern indicates that the sediments are transported mostly by graded suspension and very less by rolling processes. We therefore suggest that the sediments of present study are the product of transitional environment composed of unconsolidated fluvial and Fluvio-Marine material, predominantly from the Krishna delta region.