The Grand Canyon as seen from space! #geology http://pic.twitter.com/VbVWOzjZip
— Geology Tweets (@GeologyTime) July 15, 2017
via Twitter https://twitter.com/GeologyTime
July 16, 2017 at 01:13AM
The Grand Canyon as seen from space! #geology http://pic.twitter.com/VbVWOzjZip
— Geology Tweets (@GeologyTime) July 15, 2017
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