The most recent eruptions, between 20, culminated in the extrusion of a new dome and the formation of several lahars, one of which was larger than the 1985 lahar at the Nevado del Ruiz Volcano that buried the town of Armero. This apparently monotonous depositional history was significantly interrupted in the Late Pleistocene by gravitational collapse of the southern flank, generating a large debris avalanche and associated debris flows. They are predominantly lava flow accumulations, and the most recent product is an assemblage of domes located at the summit. Thirteen volcano–stratigraphic units have been defined. These stages led to the construction of two main volcanic edifices (Pre–Huila and Huila). Its eruptive history, which began at 1.5 Ma (early Pleistocene), is divided into three stages: the Pre–Huila Stage, which ended 100 000 years ago the Ancient Huila Stage (Late Pleistocene), which continued until the end of the Last Glaciation and the Recent Huila Stage, which began 11 000–10 000 years ago (Holocene). The Nevado del Huila Volcanic Complex, so named since 1995, is the tallest active volcano (5364 masl) in Colombia. ĭownload chapter Download supplementary information Servicio Geológico Colombiano, Publicaciones Geológicas Especiales 38, p. (editors), The Geology of Colombia, Volume 4 Quaternary. Gestión de Oficialización y Productos oficializadosĪna María CORREA–TAMAYO, Bernardo Alonso PULGARÍN–ALZATE and Eumenio ANCOCHEA–SOTOĬorrea–Tamayo, A.M., Pulgarín–Alzate, B.A.Investigación y monitoreo actividad volcánica.Investigación y monitoreo actividad sísmica.Consulta de información Geoquímica y Geofísica.
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