EARLY PROTEROZOIC ARAVALLI METASEDIMENTS AND THEIR RELATION WITH THE AHAR RIVER GRANITE AROUND UDAIPUR, RAJASTHAN

The Aravalli Supergroup around Udaipur area, comprising a volcano-sedi mentary assemblage, is classified into three Groups, viz., the Delwara , the Debari and the Jharol Groups, based on two prominent horizons of conglomerate. The Lower Aravalli Delwara Group is separated from the Middle Aravalli Debari Group by a pronounced unconformity marked by a thick horizon of conglomerate exposed at Kabita which has been correla ted with the Debari conglomerate of the type locality. The Bari Lake v olcanics are correlated with the Delwara volcanics and the quartzile-c onglomerate occurring within the former are intertrappean in nature. T he Abar River Granite is identified as the post-Middle Aravalli intrus ive granite, which intruded the Delwara volcanics and the Debari phyll ite in comagmatic pulses of the same granitic magma.