Petrological Study Of Kalrayan Hill, Villupuram District Of Tamil Nadu

Abstract

The present research is based on the study of Lithology in the Kalrayan hills. Detailed petrographic study of collected sampled rocks monitored in this study. The rock samples are collected from 16 locations of the study area. Thin section for all rocks is prepared in
laboratory for the megascopic observation. Different types of methods used in this research which are literature survey, field study, laboratory study and petrographic study. From the megascopic observation it’s found that different types of rocks present in this study area. Dolerite, Dolerite with coarse grain, Hornblende gneiss and Charnokite rocks present in the study area. Dolerite composed of quartz, labradorite, augite, and hornblende while Dolerite with coarse grain composed of quartz, orthoclase, labradorite, biotite, hornblende, and microcline. Hornblendegneiss composed of hornblende and feldspar and Charnokite composed of quartz, orthoclase, labradorite, microcline, hornblende, diopside. Both Dolerite and Dolerite with coarse grain found as intrusive and the batholiths in magma, seen in major parts of peninsular India while Charnockite rocks are situating bellow laterite.