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Cerro Chanka : ウィキペディア英語版 | Cerro Chanka
Cerro Chanka (also known as Chanka or Pabellon) is a Pleistocene lava dome in the Andes. It is part of the Altiplano-Puna volcanic complex. Potassium-argon dating indicates that the dome was erupted 119.8±5.4 ka ago.〔 Another reported age is 1.5±0.1 mya.〔 The dome is located on the northwestern side of Cerro del Azufre. It is constructed from three lobes with diametres of . The flanks of the dome are steep and talus and lava blocks lie at its feet.〔 Cerro Chanka has a SiO2 content of 66% and is of calc-alkaline origin. The lavas are potassium-rich dacitic and rhyolitic save for an andesitic mafic component, and rich in crystals.〔 == See also ==
* Cerro Chao * Cerro Chascon-Runtu Jarita complex * Tocorpuri
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