page_title: Llullaillaco
hierarchical_section_title: Llullaillaco
caption_attribution_description: Llullaillaco del Este
context_page_description: Llullaillaco is a dormant stratovolcano at the border of Argentina and Chile. It lies in the Puna de Atacama, a region of tall volcanic peaks on a high plateau close to the Atacama Desert, one of the driest places in the world. It is the second highest active volcano in the world after Ojos del Salado.
  Llullaillaco formed during two different phases in the Pleistocene-Holocene out of dacitic lava flows. The oldest rocks are about 1.5 million years old. About 150,000 years ago, the volcano's southeastern flank collapsed, generating a debris avalanche that reached as far as 25 kilometres from the summit. The youngest dated rocks were erupted 5,600 ± 250 years ago in the summit region, but there are reports of activity from the 19th century.
  The mountain's first recorded climb was in 1950, but traces of earlier climbs and a number of archeological sites were found on the mountain and at its feet; Llullaillaco marks the highest archeological site in the world. In 1999, the mummified remains of three children, known as the Children of Llullaillaco, were found at its summit. They are presumed to have been human sacrifices.
context_section_description: Llullaillaco ([ʎuʎajˈʎako]) is a dormant stratovolcano at the border of Argentina (Salta Province) and Chile (Antofagasta Region). It lies in the Puna de Atacama, a region of tall volcanic peaks on a high plateau close to the Atacama Desert, one of the driest places in the world. It is the second highest active volcano in the world after Ojos del Salado.
  Llullaillaco formed during two different phases in the Pleistocene-Holocene out of dacitic lava flows. The oldest rocks are about 1.5 million years old. About 150,000 years ago, the volcano's southeastern flank collapsed, generating a debris avalanche that reached as far as 25 kilometres (16 mi) from the summit. The youngest dated rocks were erupted 5,600 ± 250 years ago in the summit region, but there are reports of activity from the 19th century.
  The mountain's first recorded climb was in 1950, but traces of earlier climbs and a number of archeological sites were found on the mountain and at its feet; Llullaillaco marks the highest archeological site in the world. In 1999, the mummified remains of three children, known as the Children of Llullaillaco, were found at its summit. They are presumed to have been human sacrifices. The occurrence of mice in the summit region has been reported as well.
caption: Llullaillaco from the east
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