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Mount Rushmore


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Author Topic: Mount Rushmore  (Read 1773 times)
Shonnon
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« Reply #105 on: February 24, 2013, 02:36:01 am »



Granite Vision

Photograph from Rapid City Chamber of Commerce/National Geographic

To get faces to emerge from the mountain, workers bore cylindrical holes into the granite and ran electric charges from a blasting cap to a plunger box on the top of the mountain. The dynamite blasts were set off once all the workers were off the mountain.

February 16, 2013
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