Small-scale crescent-shaped bedforms in submarine volcanic setting: examples from Stromboli and Salina island (Italy) (Articolo in rivista)

Type
Label
  • Small-scale crescent-shaped bedforms in submarine volcanic setting: examples from Stromboli and Salina island (Italy) (Articolo in rivista) (literal)
Anno
  • 2013-01-01T00:00:00+01:00 (literal)
Alternative label
  • Daniele Casalbore, Alessandro Bosman, Claudia Romagnoli, Francesco Latino Chiocci (2013)
    Small-scale crescent-shaped bedforms in submarine volcanic setting: examples from Stromboli and Salina island (Italy)
    in GeoActa (Bologna); Amorosi, bologna (Italia)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Daniele Casalbore, Alessandro Bosman, Claudia Romagnoli, Francesco Latino Chiocci (literal)
Pagina inizio
  • 301 (literal)
Pagina fine
  • 310 (literal)
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  • 12 (literal)
Rivista
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#pagineTotali
  • 9 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • Casalbore assegnista IGAG, Bosman ricercatore IGAG, Chiocci professore universitario affiliato IGAG (literal)
Titolo
  • Small-scale crescent-shaped bedforms in submarine volcanic setting: examples from Stromboli and Salina island (Italy) (literal)
Abstract
  • Newly collected high-resolution multibeam bathymetry around Stromboli and Salina islands (Aeolian Archipelago, Southern Tyrrhenian Sea) shows a large number of small-scale crescent-shaped bedforms within flat-bottomed channelized features carving the submarine volcanic flanks. The bedforms have wavelength of tens of meters and wave height of some meters; their crest-lines are roughly perpendicular to the maximum slope and generally have concave-downslope shapes. The origin of these bedforms has been mainly related to repeated mechanisms of erosion and deposition due to sediment-laden gravity flows on the basis of their geometry and the morphological setting. Time-lapse bathymetric surveys show an upslope migration of the bedforms within Piscità Channel at Stromboli, highlighting active sedimentary dynamics. This is consistent with the shallow depths (< 10 m) of the headwall of Piscità Channel, interacting with local costal dynamics and fed by the products of the persistent strombolian activity. Differently, no significant morphological variations are observed at the 10-years scale for the bedforms within the North Salina Channel. This is consistent with the deeper headwall of this channel (depth > 90 m), which was likely inactive during the present high-stand conditions (i.e., the last 6 ka). At Salina, the generation of the bedforms has been tentatively related to sediment-gravity flows triggered by the most recent explosive eruptions occurred on the island at ~27 and 17 ka, in different paleo-environmental conditions relative to the present-day level (literal)
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