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Muscovite schist (metamorphosed Harpers Formation?) from Throroughfare Gap / Bull Run Mountain, Virginia, bearing euhedral porphyroblasts of magnetite. Sample measures 8.5 by 2.5 cm. Image made as part of the MAGIC project (Mid-Atlantic Geo-Imagery Collection) using Northern Virginia Community College's gigamacro...
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Featuring actinolite, augite, almandine, epidote, quartz, orthoclase, 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 Geo-Imagery Collection) using Northern Virginia Community College's gigamacro rig, as see...
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- 440
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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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- 652
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Sand from Calvert Cliffs State Park, MD. Featuring ilmenite, quartz, garnet, magentite, rutile, and zircon. 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 Geo-Imagery Collection) using Northern Virginia Community College'...
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