Mark A. Kirschbaum Ronald R. Charpentier Troy Cook Timothy R. Klett Donald L. Gautier Richard M. Pollastro Jean N. Weaver Michael Brownfield Christopher J. Schenk 2011 Using a performance-based geological assessment methodology, the U.S. Geological Survey estimated mean volumes of 13.4 trillion cubic feet of potential technically recoverable shale gas and 0.5 billion barrels of technically recoverable shale oil resources in the Norte Basin of Uruguay. application/pdf 10.3133/fs20113100 en U.S. Geological Survey Assessment of potential shale gas and shale oil resources of the Norte Basin, Uruguay, 2011 reports