|
The rock was removed using a simple but time consuming technique. The wall was irregular and the always removed rock from edges. To get the rock off the wall, the top of the rock was first removed, by cutting a horizontal furrow into the rather soft rock with an ax or pick. Then they cut holes into the rock, one above the other, where they hammered wedges into the rock. At last this caused a vertical crack deep into the rock. If this was done in a right angle from both sides of the edge, the rock between the two cracks had an almost rectangular shape. With the furrow on top, the two joining crack on the far side, the just made the rock tumble over by continually hammering the wedges into the cracks.
|