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Large carbonate concretion in black shale (Huron Shale Member, Ohio Shale, Upper Devonian; ravine just east of the Olentangy River, Highbanks Park, Lewis Center, Ohio, USA) 8.jpg - Ser Amantio di Nicolao
Fig 04 Chart of.jpg - Chris Light
Fig 06 Schematic cross section.jpg - Chris Light
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