Early Proterozoic Aravalli Metasediments and Their Relation with the Ahar River Granite Around Udaipur, Rajasthan

The Aravalli Supergroup around udaipur area, comprising volcano-sedimentary 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 Dcbari Group by a pronounced unconformity marked by a thick horizon of conglomerate exposed at Kabita which has heen correlated with the Debari conglomerate of the type locality. The Bari Lake volcanics are correlated with the Delwara volcanics and the quartzite-conglomerate occurring within the former are intertrappean in nature. The Ahar River Granite is identified as the post-Middle Aravalli intrusive granite, which intruded the Delwara volcanics and the Debari phyllite in comagmatic pulses of the same granitic magma.