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Gigapans

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  1. Archean conglomerate with detrital pyrite, indicative of a low-oxygen atmosphere. Sample is 16.5 cm across at its widest point, and was provided by Dr. Jay Kaufman of the University of Maryland.

  2. Featuring pyrite, goethite, and grains of a green silicate which may be epidote. 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 seen he...

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  3. Berti and Edi explore a mineralized roadcut adjacent to one of the gold mines at Hemlo, Ontario.