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BIF ventifact (limonite-magnetite banded iron formation, Archean; Ferris Dune Field, Windy Gap, Wyoming, USA) 3 (25473779214).jpg - Ser Amantio di Nicolao
Fuchsitic quartzite (Elmers Rock Greenstone Belt, Archean, )2.54 Ga; Laramie Range, Wyoming, USA) 1.jpg - Ser Amantio di Nicolao
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