Ubinas: the evolution of the historically most active volcano in southern Peru

  title={Ubinas: the evolution of the historically most active volcano in southern Peru},
  author={Jean-Claude Thouret and Marco Rivera and Gerhard W{\"o}rner and Marie C. Gerbe and Anthony Finizola and Michel Fornari and Katherine Gonzales},
  journal={Bulletin of Volcanology},
Ubinas volcano has had 23 degassing and ashfall episodes since A.D. 1550, making it the historically most active volcano in southern Peru. Based on fieldwork, on interpretation of aerial photographs and satellite images, and on radiometric ages, the eruptive history of Ubinas is divided into two major periods. Ubinas I (Middle Pleistocene >376 ka) is characterized by lava flow activity that formed the lower part of the edifice. This edifice collapsed and resulted in a debris-avalanche deposit… 
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