Did You Know : Mount Rushmore
CONTENTS
- Mount Rushmore National Memorial
- Crazy Horse
- Did You Know : Black Hills
- Did You Know : Gutzon Borglum
- Did You Know : Mount Rushmore
- Did You Know : Work of Art
- History of Mount Rushmore
- In A Nutshell
- Jefferson
- Lincoln
- Lincoln Borglum Museum
- Making Mount Rushmore
- Roosevelt
- Washington
- What Can You Do?
- Mount Rushmore Map
- Mount Rushmore Photos
- Recent Mount Rushmore News
The hard granite of Mount Rushmore is among the oldest rock in the world. Geologists claim it will erode at a rate of one inch every 10,000 years.
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