Geology amd drainage analysis of the area between peram-balur and padalur in the Trichinopoly District,Tamil Nadu |
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| Authors: | Hema Raghavan V G Phansalkar V V Peshwa A G Dessai |
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| Institution: | 1. Department of Archaeology, Deccan College, Pune
2. Department of Geology, University of Poona, Pune
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| Abstract: | Photogeological studies of the area shows the presence of four major lithological groups as : 1. Precambrian basement made up of granitic gneisses and Charnockites, 2. The Utatur Group of rocks, 3. The Trichinopoly Group of rocks and 4. The Ariyalur Group of rocks. Some prominant lineaments roughly trending in NE-SW direction are seen. These lineaments represent the traces of the reactivated faults in the basemeht. The photogeological studies were supplemented by morphometric analyses. It is seen that the drainage in lower order basins is controlled by structure, i.e. by the strike of the rocks and faults in the basement. The higher order streams apparently follow the direction of regional gradient. |
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