seen from Germany
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seen from United States
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seen from China
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seen from United States
seen from United States
seen from United States
On a geology field trip through the Appalachian Valley and Ridge and Blue Ridge between Knoxville and Gatlinburg TN with the great Robert Hatcher! 👍⛏ A sample fine-grained shale from the Ordovician with ripple marks #geologyfun (at Smokey Mountain)
