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Date: 2015-04-08 14:37:27Metamorphic rocks Schist Wissahickon Formation Wissahickon Creek White Clay Creek State Park Sedimentary rock Amphibolite White Clay Creek Sandstone Petrology Geology Metamorphic petrology | White Clay Creek Preserve, Chester County, Pennsylvania; New Castle County, Delaware—A Scenic Valley and the Arc CornerAdd to Reading ListSource URL: www.dcnr.state.pa.usDownload Document from Source WebsiteFile Size: 2,02 MBShare Document on Facebook |