Category:Ferruginous chert from the Pottsville Formation

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Media in category "Ferruginous chert from the Pottsville Formation"

This category contains only the following file.

Ferruginous chert (Boggs Member, Middle Pennsylvanian; ravine below Rt. 208, east of Dresden, Muskingum County, Ohio, USA) (30622479983).jpg 2,533 × 2,193; 4.06 MB

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