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You are browsing the archive for Presidents’ Day.

February 21, 2011

A Presidents’ Day Rock: Granite (& Mica Schist)

Presidents carved in granite. Image taken from wikipedia here. Happy Presidents’ Day, everyone! Lab is nice and quiet today, in honor of our nation’s presidents. Excellent. I always accomplish more on holidays! Fewer people around to distract me. In honor of Presidents’ Day, here is a document published by the U.S. National Park Service about the geology of Mt. Rushmore: Mount Rushmore National Memorial Geologic Resource Evaluation Report And here …

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