Tambo Quemado
"A low pyroclastic shield near the Rio Lauca forms Cerro Volcán Tambo Quemado on the Bolivian Altiplano. The extremely youthful-looking volcanic complex (also known as Cerro Quemado or Volcán Sacabaya) displays fumarolic activity and is estimated to be of Holocene age. Tambo Quemado consists of a broad ignimbrite shield capped by an elongated NNE-SSW-trending vent area about 2 x 3.5 km in diameter formed by three large overlapping craters. The youngest crater lies at the southern end of the 4215-m-high summit region and contains a blocky lava dome. Wind has redistributed tephra deposits to the east and south, forming aeolian sand dunes."  -Smithsonian Volcano Archive
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