Prof Terry Engelder: Marcellus Rock Star Hydraulic Fracturing | Industrywide Issues | Pennsylvania | Reserves (Proved and Unproved) | Statewide PA May 13, 2013May 13, 2013 Dr. Terry Engelder, geologist and professor at Penn State University, is one of two men who first calculated and publicized the enormous potential Please Login to view this content. (Not a member? Join Today!) Related