D
J
Last name: DEVIDAL
First name: Jean-Luc
International audience
Correlations between marine distal ash layers and continental proximal volcanic deposits constitute a strong tool to investigate the eruptive chronology of an active volcanic arc, to constrain the detailed stratigraphy of the marine sediments, as well as help constraining the magnitude of some large explosive eruptions.In the Andean Northern...
L'arc volcanique nord andin, induit par le plongement de la plaque océanique Nazca sous le continent sud-américain, s'étend de la zone centrale de l'Équateur à la zone centrale de la cordillère colombienne. En Équateur, l'arc est composé de plus de 80 édifices volcaniques actifs durant le Quaternaire, ce qui correspond à la plus forte densité...
Along active margins, large magnitude earthquakes induce submarine slope instabilities, generating turbidite deposits and debris flows. These catastrophic events are recorded in the stratigraphy from the slope basins to the subduction trench. These sedimentary records provide a unique opportunity to time-extend local seismic catalogs, and their...
Major eruptions in the Andes are mainly characterized by the emission of large volumes of gas and volcanic ash. The plume may reach the stratosphere and be transported by winds. In Ecuador, the prevailing winds are westward, and the volcanic ash, also called tephra, is transported towards the Pacific Ocean. Vallejo (2011) studied tephra layers...