Metamorphism in the Madurai Granulite Block: A Conventional Outlook

“…………They were first found in full variety at St. Thomas’ Mount and Plallavaram 10 miles south of Madras city; from quarries in these localities large quantities of rocks have been obtained for building and ornamental purposes in Madras. Subsequently the same rocks were found to make up the mountain masses of the Shevaroys Nilgiris the Palnis and the great ridge of high ground forming part of the Western Ghats stretching southwards as far as Cape Comorin and reappearing above the sea level in Cylone”.- the words by Thomas Holland on charnockite. The book is all about charnockites and associated gneisses from the Madurai Granulite Block of the Southern Granulite Terrain. Looked into its association and genesis with very conventional view point of petrography PT paths and geochronology.