Christopher J. Schenk Timothy R. Klett Tracey J. Mercier Stephanie B. Gaswirth Kristen R. Marra Thomas M. Finn Phuong A. Le Heidi M. Leathers-Miller Michael E. Brownfield 2017 Using a geology-based assessment methodology, the U.S. Geological Survey estimated undiscovered, technically recoverable mean conventional resources of 13.4 billion barrels of oil and 4.6 trillion cubic feet of gas in the East African Rift Province of east Africa. application/pdf 10.3133/fs20173006 en U.S. Geological Survey Assessment of conventional oil resources of the East African Rift Province, East Africa, 2016 reports