Vengad Conglomerate of Wynad Schist Belt, Kerala

The Vengad Conglomerate is a basal polymict conglomerate, separating the high-grade Wynad Group of rocks from the low grade Vengad Group. The conglomerate along with the other members of the Vengad Group has undergone two phases of deformation and has attained lower amphibolite facies metamorphism. The petrography and chemistry of the pebbles and the matrix indicate the source area to be a mixed terrain consisting of tonalite-trondhjemite gneisses, mafic-ultramafic rocks, quartzites and quartz veins.