Incorporation processes in volcanic rockslide-debris avalanches from field observations: implications on emplacement mechanisms

Abstract:

5. Conclusions Incorporation processes are complex and controlled by the substratum nature and topography. Where the substratum of the rockslide-debris avalanche has a flat topography there is little incorporation. Erosion appears where the substratum topography is rough. Field observations show that basal shearing is a very common incorporation process that can be amplified by topographic breaks. Bulldozer structures are less common and mostly present in distal region associated to ductile substratum. Nevertheless substratum fluidisation evidence has been found in no less than four deposits. These features are always associated with fine grained, unconsolidated and/or low density substratum. We expect that such substratum can enhance the flow mobility.

Año de publicación:

2010

Keywords:

Fuente:

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