Mount Rushmore is carved out of the granite face of the Black Hills in South Dakota.
Actually, Mount Rushmore is made up of granite.
The material that makes up Mount Rushmore is granite.
Mount Rushmore is carved out of the granite face of the Black Hills in South Dakota.
Granite.
The Mount Rushmore Memorial is carved out of granite, part of the Harney Peak granite batholith that forms the Black Hills.
Because the mountain that they are made on is granite.
450,000 was removed from mount Rushmore, and 90% by dynomite
Granite and Mica Schist.
The rock in which the facs are carved is granite.
Carving was done by using dynamite to blast away more than 90% of the rock. Once there was about 3 to 6 inches of rock left to remove, they used a technique called "honeycombing", drilling holes very close together, which weakened the granite so that it was easier to remove. After the honeycombing, the granite was smoothed with a hand facer or a bumper tool, creating a surface as smooth as sidewalk.
Mount Rushmore