Volcanic ash-falls in peat-bog and lakes around Nevados Ampato and Sabancaya Massif (Southern Peru, Central Andes) ; Retombées volcaniques dans des tourbières et lacs autour du massif des Nevados Ampato et Sabancaya (Pérou méridional, Andes Centrales)

International audience ; Multidisciplinary investigations have been carried out on sections and sediment cores from a lake and peat bogs in the Western Cordillera in the Central Andes of Southern Peru, around Nevados Ampato, Sabancaya and Hualca Hualca volcanic massif. More than 850,000 inhabitants of the city of Arequipa and the Colca valley are concerned by further activities of those volcanoes. The aim of the current study is to complete the Holocene tephrostratigraphical model for southern Peru in which about 40 tephras are distributed within the past 50,000 years. The tephras described in... Mehr ...