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Granite (Cripple Creek Granite, Mesoproterozoic, 1.46 Ga; Park County, Colorado, USA) 3 (30885202584).jpg - Ser Amantio di Nicolao
Porphyritic granite (pgmc facies, Pikes Peak Batholith, Mesoproterozoic, 1.08 GA; Manitou Springs, Colorado, USA) 1.jpg - Ser Amantio di Nicolao
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