Category:Wissahickon Schist in Pennsylvania

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Media in category "Wissahickon Schist in Pennsylvania"

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

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  Oakland Run (Revisited) (1) (8040522964).jpg 5,184 × 3,027; 14.81 MB
  
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  Oakland Run (Revisited) (2) (8040513084).jpg 5,184 × 3,456; 13.23 MB
  
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  Schist (Wissahickon Formation, multiply metamorphosed during the Paleozoic; near Philadelphia, Pennsylvania, USA) (15218563954).jpg 4,842 × 2,025; 5.57 MB