Category:Concretions from the Pottsville Formation

Subcategories

This category has only the following subcategory.

Media in category "Concretions from the Pottsville Formation"

The following 3 files are in this category, out of 3 total.

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  Ironstone concretion (Lower Mercer Ore, Middle Pennsylvanian; Rt. 16 roadcut near Trinway, Ohio, USA) 2 (38438091796).jpg 3,562 × 2,028; 4.75 MB
  
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  Ironstone concretion (Lower Mercer Ore, Middle Pennsylvanian; Rt. 16 roadcut near Trinway, Ohio, USA) 5 (26718140809).jpg 3,408 × 2,085; 2.82 MB
  
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  Ironstone concretion (lower Pottsville Group, Lower Pennsylvanian; Pleasant Valley Limestone Quarry, Muskingum County, Ohio, USA) 1 (30226085737).jpg 2,047 × 1,705; 2.45 MB