Geological Thin Sections
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Thin section photo of graphitic schist from roadcut in Pownal Center, Vermont, along Rt. 7. Taken with 4x objective. Field of view is approximately 20 by 15 mm. Taken with automated imaging system at Williams College.
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Thin section of micaceous quartzite from the Rattlesnake Thrust from Pownal, Vermont. Field of view is approximately 20 by 27 mm. Dark seams are muscovite-chlorite-rich layers, and some folds are defined by the layers. Scattered feldspar grains also present. Crossed polarizers at 65 degrees. Created with the automat...
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Created with a 10X objective. Plain polarized light. Field of view is approximately 8 by 6 mm.
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Image taken with 40X objective. Field of view is approximately2 by 1.5 mm
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Graphitic schist sample from Pownal Center, Vermont, along Rt. 7. Sample 3000f shot with 10x objective. Field of view is approximately 8 by 6 mm. Taken with automated imaging system at Williams College.
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Image taken with a 10x objective. Field of view is approximately 8 by 6 mm.
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Field of view is approximatly 15 by 20 mm. Crossed polars. Image is a garnet-chloritoid schist from Jamaica, Vermont. Large porphyroblast of garnet (nearly opaque) contains gently curved inclusion trail of chloritoid. Chloritoid is appears as shades of gray. Well developed crenulation cleavage in right third and lower ...
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