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Petrology of the Ultramafic Rocks of Chalk Hills Salem Tamil Nadu
Studies on the Dolerite Dykes of Hunsur Periyapatna area Mysore District
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amphibole aquifers associated average banded barytes basin beds block bodies borehole carbonate Chalk Hills chemical clay colour composition consist Cuddapah deep deposits depth detailed dips direction district drilled dunites dykes east evidences exposed extension faults field follows formation four Geol GEOLOGICAL SURVEY gneisses gold grains green Groundwater Group hematite important indicates iron Kerala layered length lignite limestone located lode magnesite mapping metres minerals mining minor nature Nilgiri observations occur olivine origin oxide peridotites phase places Pleistocene present pyroxene quartz quartzite range recorded region Report represent reserve result rocks Salem samples sands sedimentary sediments seen shear silica southern strike structure studies suggest surface Survey of India Table Tertiary thickness tonnes traced trend ultramafic Unpublished GSI Report upto values varies veins weathering western zone