Category:Pyrite concretions (Anna Shale, Middle Pennsylvanian; Sparta area coal mine, Illinois)

Media in category "Pyrite concretions (Anna Shale, Middle Pennsylvanian; Sparta area coal mine, Illinois)"

The following 6 files are in this category, out of 6 total.

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  Pyrite concretion (Anna Shale, Middle Pennsylvanian; Sparta area coal mine, Illinois, USA) 1.jpg 3,399 × 3,661; 6.23 MB
  
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  Pyrite concretion (Anna Shale, Middle Pennsylvanian; Sparta area coal mine, Illinois, USA) 2.jpg 3,399 × 3,661; 6.37 MB
  
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  Pyrite concretion (Anna Shale, Middle Pennsylvanian; Sparta area coal mine, Illinois, USA) 3.jpg 3,399 × 3,661; 6.51 MB
  
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  Pyrite concretion (Anna Shale, Middle Pennsylvanian; Sparta area coal mine, Illinois, USA) 4.jpg 3,400 × 3,661; 6.46 MB
  
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  Pyrite concretion (Anna Shale, Middle Pennsylvanian; Sparta area coal mine, Illinois, USA) 5.jpg 2,828 × 2,424; 4.12 MB
  
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  Pyrite concretion (Anna Shale, Middle Pennsylvanian; Sparta area coal mine, Illinois, USA) 6.jpg 2,776 × 2,404; 4.16 MB