Ad: Geological Time Rocks! Geological Age Timeline Coffee Mug
No need to be a geologist or earth scientist to enjoy this mug featuring Earth's history in geological time in a spiral along with the saying "Geological Time Rocks!" Includes labels of the main eons epochs and periods. Make others do a double-take of geological time with this geek humor mug! No need to be a rock hound to enjoy. myEarthScience
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