Apart from the vigorous post-orogenic magmatic event, a large number of so-called ‘Purana' basins was actively developing near the orogenic belts. The word ‘Purana' means ‘ancient' and was used to depict the group of isolated sedimentary basins with thick Proterozoic sedimentary strata that are relatively undeformed on the Indian Shield. The Vindhyan Basin and the Marwar Basin are part of the Purana basins that sit near the Aravalli Mountain Range.