This #FridayFold sits under George Washington's nose on Hwy 244 at Mt. Rushmore. Some of the granitic dikes are p… https://t.co/LIQfb3sraM http://pic.twitter.com/uN0Onyx9s2
— ccarrigan (@GeosciImaging) May 12, 2017
via Twitter https://twitter.com/GeosciImaging
May 12, 2017 at 10:58PM
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