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Date: 2001-08-28 20:44:20Geology of New Jersey Geology of Pennsylvania Geology of West Virginia Ordovician Devonian Martinsburg Formation Source rock Bend Arch–Fort Worth Basin Geology of the Appalachians Geology Shale Geography of the United States | Add to Reading ListSource URL: certmapper.cr.usgs.govDownload Document from Source WebsiteFile Size: 847,55 KBShare Document on Facebook |