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(Encyclopedia)Llullaillaco yo͞oˌyīyäˈkō [key], extinct volcano, 22,057 ft (6,723 m) high, on the border of Chile and Argentina. One of the highest peaks in the Andes and perpetually snowcapped, it overlooks a...


(Encyclopedia)Andes ănˈdēz [key], mountain system, more than 5,000 mi (8,000 km) long, W South America. The ranges run generally parallel to the Pacific coast and extend from Tierra del Fuego northward, across t...


(Encyclopedia)CE5 Argentina ärjəntēˈnə, Span. ärhāntēˈnä [key], officially Argentine Republic, republic (2020 est. pop. 45,380,000), 1,072,157 sq mi (2,776,889 sq k...

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