RT Journal Article
T1 Abanicos aluviales telescópicos cuaternarios. Andes argentinos
T1 Quaternary telescopic alluvial fans. Argentine Andean Ranges
A1 Colombo Piñol, Ferrán
AB The largest rivers that drain the Argentine Andean Ranges are characterised by incised valleys in highmountains and by a variety of Quaternary terraces. Their convex-up morphology suggests that these terracesare related to a series of alluvial fans developed where the tributaries join the main river. The succession ofalluvial aggradation and degradation is controlled by local base level variation conditioned by temporarylake development in the main river valley. All these factors give rise to the segmented morphology of thefan surface, yielding a telescopic relationship. The variation in the morphology and number of terracessuggests that they are not controlled by a general base level. Neither tectonic activity nor significant climaticchanges account for the alluvial fans at the confluence of the tributaries and the main river. Significantvariations in rainfall or thunderstorms induced by the El Niño Southern Oscillation (ENSO) could explainthe genesis of these telescopic alluvial fans
PB Sociedad Geológica de España
YR 2005
FD 2005
LK http://hdl.handle.net/10272/8685
UL http://hdl.handle.net/10272/8685
LA spa
DS Repositorio Institucional de la Universidad de Huelva
RD 30 may 2026