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- Klingle Valley metaconglomerate, Laurel Formation, Rock Creek Shear Zone, Washington, DC by Callan Bentley
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Strained metaconglomerate that crops out in a stream in Klingle Valley, DC. Retrograde metamorphism is apparent, with sericite-after-starulote pseudomorphs.
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- 34
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Sand from Pays de la Loire, Vendee, Bretignolles-sur-Mer, France. Featuring quartz, almandine, orthoclase, staurolite, clinozoisite, spinel, zircon, rutile, and magnetite. The petri dish is 9 cm in diameter. Sample provided by Siim Sepp of sandatlas.org. Image made as part of the MAGIC project (Mid-Atlantic Ge...
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Teeming with garnets big and small, fresh and weathered, the Setters Schist is a muscovite schist metamorphosed from a pelitic protolith in (presumably) the Taconian orogeny. It also features staurolite, which is present in this sample, and kyanite, which isn't. Sample collected in Sparks, MD. Image made as part ...
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- 480
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- 46
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Thin section photograph with plane polarized light. Garnet, staurolite, kyanite, biotite, muscovite schist of the Gassetts Schist. Field of view is approximately 20 by 20 mm. Taken with an automated system at Williams College.
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