Quinchilca (volcano)

Quinchilca is a volcano in Chile. 39°40′48″S 72°00′29″W / 39.68°S 72.008°W / -39.68; -72.008[1] It is situated south of Villarrica volcano and consists of a caldera and lava domes.[1] The volcano has a semicircular form constructed by layers of lavas and volcaniclastic rocks, with an eroded core. Volcanic rocks include basalt and basaltic andesite.[2]

Potassium-argon dating has yielded an age of 800,000 ± 600,000 on its rocks,[1] older dates such as 1.4 ± 0.6 million years have been reported as well.[2]

  1. ^ a b c "Quinchilca". Global Volcanism Program. Smithsonian Institution.
  2. ^ a b Lara, Luis; Rodríguez, Carolina; Moreno, Hugo; Pérez de Arce, Carlos (July 2001). "Geocronología K-Ar y geoquímica del volcanismo plioceno superior-pleistoceno de los Andes del sur (39-42°S)". Revista Geológica de Chile. 28 (1): 67–90. doi:10.4067/S0716-02082001000100004. ISSN 0716-0208.