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Authors
Affiliations
1 Department of Earth Sciences, Tamil University, Thanjavur - 613 403, IN
2 Departmenotf Geology, National College, Trichy - 620 001
3 Department of Disaster Management, SASTRA Deemed University, Thanjavur - 613 403
Source
Journal of Geological Society of India (Online archive from Vol 1 to Vol 78), Vol 69, No 6 (2007), Pagination: 1361-1368
Abstract
Silica sand samples of Marakkanam region have been studied to understand the textural variation of the sediments. The study area has been divided into three groups, namely, Mudaliyarkuppam, Kakapallam and Agaram (Pallarnpakkarn, Vadaagaram and Urani) on the basis of relief. Frequency curves of the silica sands in the study area show a polymodal distribution in Mudaliyarkupparn and Agaram group and bimodal distribution at Kakapallam Group. Mudaliyarkuppam samples are coarser to medium grained, poorly sorted, fine to strongly fine skewed and platy to mesokurtic in nature. On the other hand, Kakapallam Group is represented by its coarser size, very well sorted; fine skewed and leptokurtic in nature. Agaram Group is characterized by medium sands, moderately sorted, fine skewed to nearly symmetrical skewed and mesokurtic. Bivariant plots show a distinct grouping with an influence of offshore environment at Mudaliyarkuppam Group and, channel bar and dune environment at Kakapallam and Agaram Group.
Keywords
Sedimentology, Grain size, Silica sands, Marakkanam, Tamil Nadu.
