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Showing 1 to 1 of 1 for “"Pennsylvania Piedmont"”.
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Petrogenesis of the Springfield Granodiorite, southeast Pennsylvania Piedmont
… intrudes the Wissahickon schist in the southeast Pennsylvania Piedmont. The mineralogy of the pluton. in order of decreasing abundance is plagioclase, quartz, microcline, biotite, epidote (often with allanite cores) and trace amounts of hornblende. Accessory minerals include sphene, magnetite, …