Tracey J. Mercier Cheryl A. Woodall Thomas M. Finn Phuong A. Le Michael E. Brownfield Kristen R. Marra Stephanie B. Gaswirth Heidi M. Leathers-Miller Janet K. Pitman Christopher J. Schenk 2021 <p>Using a geology-based assessment methodology, the U.S. Geological Survey estimated undiscovered, technically recoverable mean resources of 135.4 trillion cubic feet of continuous gas in Devonian–Mississippian shales in the Horn River Basin, Cordova Embayment, and Liard Basin of Canada.</p> application/pdf 10.3133/fs20203015 en U.S. Geological Survey Assessment of continuous gas resources in the Horn River Basin, Cordova Embayment, and Liard Basin, Canada, 2019 reports