evidence: The Southern Patagonian Ice Field (Spanish: Campo de Hielo Patagónico Sur), located at the Southern Patagonic Andes between Chile and Argentina, is the world's second largest contiguous extrapolar ice field.[1] It is the bigger of two remnant parts of the Patagonian Ice Sheet, which covered all of southern Chile during the last glacial period, locally called the Llanquihue glaciation. The Southern Patagonia Ice Field extends from parallels 48° 15′ S to 51° 30′ S for approximately 350 kilometres (220 mi), and has an approximate area of 16,480 km2 (6,360 sq mi), of which 14,200 km2 belong to Chile and 2,600 km2 belong to Argentina.[lower-alpha 1] [...] The Southern Patagonian Ice Field section of the border is the last remaining border issue between Chile and Argentina. On August 1, 1991, the governments of Chile and Argentina agreed on a borderline, but the agreement was never ratified by the Argentine legislature. Later, in 1998, both governments agreed to redraw the borderline between Mount Fitz Roy and Cerro Murallón[12][13]