Figure 27.--Northern Patagonian Ice Field (green). Taken from Lliboutry (1956); additional geographic place-names supplied by Cedomir Marangunic. The thick lines are ridgelines. Some geographic place-names are inconsistent with those used in the text, and those in the text conform to the usage recommended by the U.S. Board on Geographic Names in the gazetteers of Argentina (1992a) and Chile (1967, 1992b).