Category:Wissahickon Schist in Pennsylvania
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Media in category "Wissahickon Schist in Pennsylvania"
The following 2 files are in this category, out of 2 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