February 21, 2011

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

Posted by Evelyn Mervine

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 is a simple geologic map of the Mt. Rushmore area taken from the above document:

Simple geologic map of the Mt. Rushmore area. Figure taken from here.