Morpho-structural setting of Stromboli volcano revealed by high-resolution bathymetry and backscatter data of its submarine portions |
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Authors: | Alessandro Bosman Francesco L Chiocci Claudia Romagnoli |
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Institution: | (1) CNR-IGAG, Istituto di Geologia Ambientale e Geoingegneria, Area della Ricerca di Roma 1, Via Salaria Km 29,300-C.P. 10, Monterotondo Stazione, 00016 Roma, Italy;(2) Dip. Scienze della Terra, University of Roma “La Sapienza”, P.le Aldo Moro 5, 00185 Roma, Italy;(3) Dip. Scienze della Terra e Geologico-Ambientali, University of Bologna, P.za Porta S. Donato 1, 40126 Bologna, Italy |
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Abstract: | The first high-resolution bathymetric and backscatter maps of offshore Stromboli Island are presented, together with an interpretation
of its volcanic, structural and sedimentary features. The volcanic edifice is characterized by a sub-conical shape with a
quasi-bilateral symmetry with respect to a NE-SW axis. The dimensions of the Strombolicchio volcanic centre, to the NE of
Stromboli, have been restored by redrawing its morphology before wave action that eroded it in Late Quaternary time. On the
NE submarine flank of Strombolicchio, a N64°E structural trend controls the shape of Strombolicchio Canyon. On the southern
side of Stromboli, the submarine flank has a radial structural trend, possibly reflecting a volcanic stress regime. Landslide
scars at various scales are ubiquitous on the submarine slopes of Stromboli. Repeated large-scale lateral collapses have affected
both the northwestern and southeastern unbuttressed flanks of the volcano, producing large debris avalanche deposits. |
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