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Thin section image of deformed granitic gneiss belonging to the Tyringham Gneiss, 1170 Ma. Image is approximately 20 by 27 mm. Created with the automated thin section imaging system at Williams College
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Gravel in gravel road just off of Rockwell Church Road in Winder, GA.
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This cloudy morning it was at least as inspiring as the view in the opposite direction.
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The Commonwealth of Virginia's Department of Geology and Mineral Resources has their offices in Charlottesville, Virginia. Outside their building is an exceptional collection of large rock samples from across the state. Samples include igneous, sedimentary, and metamorphic rocks from all five physiographic provinces, a...
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Hand sample pan - maybe not that much more detail than a zoomed photo, but the pan viewer gives more flexibility in viewing. (Would be better with a DSLR, I think, but we're not so equipped yet.) Outcrop location: gigapan.org/gigapans/50957/ Thin section: gigapan.org/gigapans/72751/
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Thin section (cross polars) of the Willimantic Dome (see outcrop pan gigapan.org/gigapans/50957/ for sample location)
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There are some far more spectacular roadcuts along I-70 just west of Denver, however this was the most accessible on short notice during my trip to GSA.
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Part of the rock formation called Devil's Oven, at Devils Hopyard State Park. This particular set of rocks has undergone differential weathering - some parts of the rock weather faster than others - which has left caves in places. Local folklore has it that during the American Revolution, these caves served as hiding...
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Part of the northern part of Devils Hopyard State Park: Eightmile River falls here over schist and gneiss. Weathering has formed circular "potholes" in the rock helps lend the name to the park (local legend is that the devil's tail made the holes).
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The off/on ramp for Route 6 at Route 32 in Willimantic, CT exposes some gneiss cliffs...
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