In SE Rajasthan, the Great Boundary Fault (GBF), a prominent dislocation zone, marks the boundary between the HG basement rocks and the paratectonic Vindhyan Supergroup rocks of, Proterozoic age. The Vindhyan equivalent sediments also developed in NW Rajasthan in a separate basin and are grouped within the Marwar Supergroup composed of molasse type sediments and evaporites.