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Date: 2015-06-15 11:16:56Geology of the United States Geology Paleozoic Shale gas Marcellus Formation Barnett Shale Natural gas Marcellus natural gas trend Hydraulic fracturing in the United States | PEC Marcellus Lease GuideAdd to Reading ListSource URL: pecpa.orgDownload Document from Source WebsiteFile Size: 3,47 MBShare Document on Facebook |