Cutting Through Rock | Construction Equipment
Sep 28, 2010· Cutting Through Rock. September 28, 2010 ... The area is known for its basalt/lava formations. These dense formations range anywhere from 12,000 to 25,000 psi in compressive strength. ... This type of rock is very resilient and requires a significant amount of energy to break. The small holes in the rock actually act as shock absorbers and keep ...