Records of the Geological Survey of India, Volume 112, Parts 7-8

activity altered Alwar anomaly associated authors bands base basic basin beds belt biotite Central chlorite colour comprises conglomerate considered consists crystalline Delhi Deoban deposits depth developed district dolomite east eastern exposed fault felspar flow folds followed Formation Geol Geological Geological Survey given glacial glacier gneiss grade grains granite grey Group hill Himalaya India indicates kankar later limestone Lower major mapping Member metamorphism mineralisation minerals nature Naugaon northern observed occur origin pebbles pegmatite phase phyllite places plane Pleistocene porphyry present quartz quartzite Quaternary Rajasthan range region represents rhyolite river rocks samples sand Sandstone SCALE schist sediments seen sequence sericite shale shows side slate slope soil structure surface Surv Survey of India tectonic terraces thickness thin Thrust tion trend types unit Upper valley values volcanic western zone