Abstract

MENDEZ, Williams  and  GONZALEZ, Zuleika. Geomorphology of the alluvial fans of the El Ávila Massif northern foothill, Vargas state, Venezuela. Revista de Investigación [online]. 2016, vol.40, n.87, pp.087-121. ISSN 1010-2914.

The active alluvial fans that have been built by torrential deposits mean highly unstable areas and hazard for the populations settled on them. The geomorphological characteristics of the fans located in the Massif El Ávila northern foothill are analyzed. The methodology considered: Characterization of the fan morphologies; morphometric measurements of the catchments and fans; estimation of the lithologic outcrop surfaces; and correlation between morphometric parameters of the fans and catchments. Show retro-filling kind morphologies with coalescence in some cases. Their longitudinal and transverse profiles show the typical concave and convex shapes. It behaves likewise as fan-deltas, part of its surfaces are under seawater. The fans are small dimensions and low slopes. The lithology has great influence on the morphology, development and extension of these, linked aspects the same way with the morphometry of the catchments.

Keywords : Geomorphology; alluvial fans; morphometry; El Ávila massif; Vargas state.

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