Marilyn E. Tennyson Tracey J. Mercier Sarah J. Hawkins Stephanie B. Gaswirth Kristen R. Marra Timothy R. Klett Phuong A. Le Michael E. Brownfield Cheryl A. Woodall Christopher J. Schenk 2017 <p>Using a geology-based assessment methodology, the U.S. Geological Survey estimated mean undiscovered, technically recoverable continuous resources of 35.1 trillion cubic feet of gas in the Amu Darya Basin Province of Turkmenistan, Uzbekistan, Iran, and Afghanistan.</p> application/pdf 10.3133/fs20173058 en U.S. Geological Survey Assessment of undiscovered continuous gas resources in the Amu Darya Basin Province of Turkmenistan, Uzbekistan, Iran, and Afghanistan, 2017 reports