History of Technology in India, Vol. I: From Antiquity to c. 1200 A.D. v1.c29.s2.t2.21

v1.c29.s2.t2.21

Sometimes, the rock-face was divided into 2 to 3 feet square blocks and deep grooves were cut between these blocks, which were then hewn off. This process was repeated until required depth was achieved. The concussions of the heavy hammer helped to remove sizeable pieces of the rock.