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Middle Run Formation (Proterozoic; Warren County core, Ohio, USA) 3.jpg - Jsj1771
Middle Run Formation (Proterozoic; Warren County core, Ohio, USA) 1.jpg - Jsj1771
Middle Run Formation (Proterozoic; Warren County core, Ohio, USA) 2.jpg - Jsj1771
Middle Run Formation (Proterozoic; Warren County core, Ohio, USA) 4.jpg - Jsj1771
Middle Run Formation (Proterozoic; Warren County core, Ohio, USA) 5.jpg - Jsj1771
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