Minerals and Metals in Ancient India v1.c18.s2.2

v1.c18.s2.2

In the south-western and central zones, there were many evidences of superficial gouging of the oxide-rich gossan cap; these were the earliest attempts at mining copper ore in Rajasthan. A large majority of these pits measure 7-8 metres in diameter and three to four metres in depth. There is evidence of fire-treating of the host rocks on the mine walls to widen the rock joints.