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This image is a derivative work of the following images:

• File:Catskill Magnafacies.svg licensed with PD-USGov-USGS
  • 2008-06-24T02:11:46Z Dhaluza 826x364 (189500 Bytes) {{Information |Description={{en|1=Generalized cross section of Catskill delta magnafacies across western Pennsylvania and Ohio (adapted from Harper, 1999). The lower part of the section, from the Hamilton Group (Marcellus Sha

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