"The Quimsachata (Kimsachata) volcano group, the northernmost young volcanoes in Peru, consist of two late-Pleistocene and Holocene monogenetic volcanoes lie at the foot of the Cordillera Oriental in an isolated area far east of the main volcanic front. Quimsachata is a high-potassium andesitic scoria cone surrounded by a compound lava shield that was erupted in flat terrain along the Vilcanota River about 11,500 years ago. Oroscocha is a rhyolitic lava dome with a short, thick lava flow erupted from a N-S-trending fissure about 6400 years ago."  -Smithsonian Volcano Archive
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