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Two types of mafic rocks are exposed around the Katekalyan region viz. amphibolites and dolerites and/or meta-dolerites. Amphibolites are further classified as volcanic amphibolites (i.e. meta-volcanics) and plutonic amphibolites (mainly dykes). Dolerites occur as small dykes. Middle Proterozoic or older rock types of the area have been intruded by mafic rocks. Volcanic amphibolites show schistose...