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| Titel |
Modeling the spatial distribution of AD 79 pumice and surge deposits of Somma-Vesuvius within the Sarno River plain (Campania, Italy) |
| VerfasserIn |
Sebastian Vogel, Michael Märker |
| Konferenz |
EGU General Assembly 2011
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 13 (2011) |
| Datensatznummer |
250047256
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| Zusammenfassung |
| The explosive eruption of Somma-Vesuvius AD 79 that destroyed the ancient settlements of
Pompeii and Herculaneum caused a caesura in the existence of an entire landscape. This is
because the Sarno River plain was almost completely covered with pumice lapilli fallout and
pyroclastic surge deposits that reach an approximate volume of 3.6 km3 of dense rock
equivalent (Sigurdsson et al., 1985). To better understand the impact on the ancient Sarno
River plain and the geomorphogenetic processes that took place during and after the eruption
AD 79 a methodology is presented to model the spatial distribution of both the AD 79 pumice
fallout and pyroclastic surge deposits. It takes into consideration the initial deposition of the
volcanic material during the eruption as well as its subsequent remobilization and
redistribution by processes of erosion, transport and accumulation. We hypothesize that the
paleo-topography before AD 79 essentially controlled initial volcanic deposition and
subsequent redistribution of the AD 79 pyroclastic material. Consequently, the applied
methodology is based on a reconstructed high resolution pre-AD 79 digital elevation
model (DEM) of the Sarno River plain, stratigraphical data of more than 1,200 core
drillings and a classification and regression tree approach. The results show different
spatial distribution patterns for both the AD 79 pumice fallout and the pyroclastic
surges.
Keywords: Somma-Vesuvius, AD 79, pumice fallout, pyroclastic surge, stratigraphical
drillings, classification and regression trees |
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