The book contains latest research articles written by eminent geologists on metamorphism, ophiolites and orgenic belts on the peninsular and extra-peninsular regions. Geothermometric,geobarometric,textural mineralogical and petrological studies have been used by the authors to deal with some crucial problems of metamorphism.Ophiolitic belts of the himalaya, metavolcanics of Kumaun,ultramafics of the archaean and geochemical aspects of the rocks of Indian ocean have also been dealt with in detail.Geochemical evolution of the aravalli,structural and tectonic characteristics of the various sectors of the Himalaya including Nepal form the subject matter of topics on orogenic belts. the volume has been dedicated to professor S. Varadarajan.