7 results on '"Lo Iacono, C."'
Search Results
2. Geo-hazards of the San Vito peninsula offshore (southwestern Tyrrhenian Sea).
- Author
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Sulli, A., Agate, M., Zizzo, E., Gasparo Morticelli, M., and Lo Iacono, C.
- Subjects
CONTINENTAL slopes ,SUBMARINE valleys ,LANDSLIDES ,PENINSULAS ,CONTINENTAL shelf ,COASTAL changes - Abstract
In this paper we present geomorphological hazard mapping of the San Vito Peninsula offshore (Sicilian margin of Tyrrhenian Sea), characterised by a very narrow continental shelf and a very dipping, tectonically active continental slope, no far from a seismogenic belt. The data set consists of morpho-bathymetric models achieved by means of multibeam survey and scattered high resolution seismic profiles. The morpho-bathymetric study highlighted some potential sites of geomorphological hazards, the most representative of which are: (i) two canyons developing from the upper slope off San Vito Cape down to the Erice basin; (ii) a dense network of small incisions across the upper slope; (iii) a very active landslide, developed onland and extending in the continental shelf close to the Scopello village. The geomorphological features that can generate submarine hazard are represented by: unstable sediment packages into canyon heads or along the upper slope; submarine canyons with regressive erosion; coastal landslides. [ABSTRACT FROM AUTHOR]
- Published
- 2021
- Full Text
- View/download PDF
3. Benthic habitat characterisation of soft-bottom continental shelves: Integration of acoustic surveys, benthic samples and trawling disturbance intensity
- Author
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de Juan, S., Lo Iacono, C., and Demestre, M.
- Subjects
- *
BENTHIC ecology , *HABITATS , *CONTINENTAL shelf , *SUSPENSION feeders , *OCEAN bottom , *ANIMAL communities , *DREDGING (Fisheries) - Abstract
Abstract: Eleven sites were located on Mediterranean continental shelves to explore the link between the physical characteristics and epibenthic fauna from soft-sediment habitats. These sites, at 32–82 m in depth, were associated with fishing grounds and the trawling intensity was estimated at the site scale to assess the effects of trawling on benthic communities. Each site was surveyed with Multi-Beam (bathymetry and backscatter), side-scan sonar, benthic grabs and a surface dredge. The sites were clustered in three habitat types. Habitat 1, with moderate trawling disturbance, was characterised by homogeneous mud and associated epifauna that was also highly homogeneous across sites. Habitat 2, with sandy mud and scattered gravel and rocks, had a high abundance of sessile suspension feeders that probably attach to the coarser substratum and benefit from the low fishing disturbance in these sites. Habitat 3 included sites with heterogeneous sediments with maërl as the prevailing biocenosis and having the highest species richness, despite being subjected to variable trawling intensity. Statistical models were used to relate environmental parameters and the species abundance. More than 3 physical variables were necessary to explain the epifaunal patterns across sites, including the percentage of mud, sediment heterogeneity and fishing effort. These analyses are an essential step for extrapolating information from benthic samples to the larger scale of habitats, mapped through acoustic surveys. Despite this, a good integration is required between the mapping of physical habitat distribution and the ecological knowledge of communities. [Copyright &y& Elsevier]
- Published
- 2013
- Full Text
- View/download PDF
4. Sediment dynamics over sand ridges on a tideless mid-outer continental shelf.
- Author
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Simarro, G., Guillén, J., Puig, P., Ribó, M., Lo Iacono, C., Palanques, A., Muñoz, A., Durán, R., and Acosta, J.
- Subjects
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CONTINENTAL shelf , *SAND waves , *SEDIMENT sampling , *HYDRODYNAMICS , *SEDIMENT transport , *SHEARING force - Abstract
A sand ridge field with crests oriented NE–SW (52°) located between 55 and 85 m water depth on the Valencia continental shelf (Spain) was mapped with multibeam swath bathymetry and characterized with seismic profiling and sediment sampling. Boundary-layer hydrodynamic measurements conducted over a sand ridge at 66 m depth show evidence of wave and current sediment resuspension during a major storm event with a three-year recurrence period. From the measured intrawave sediment concentration profiles it is shown that the suspended sediment time evolution is related not only to mean currents but also to the wave field. The near-bottom shear stress generated during storm conditions reached around 1 N/m 2 and was able to resuspend and transport sandy and muddy sediments for more than 32 h. The total suspended sediment transport in a layer of 1 m above the bottom was around 4000 kg per meter width and directed 160°. It is argued that these sand ridges were developed in a shallow environment and there is no evidence of present-day ridge migration or morphological degradation. It is hypothesized that sediment dynamics affecting sand ridges during storms favors the maintenance of their morphology. [ABSTRACT FROM AUTHOR]
- Published
- 2015
- Full Text
- View/download PDF
5. Geo-hazards of the San Vito peninsula offshore (southwestern Tyrrhenian Sea)
- Author
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Attilio Sulli, C. Lo Iacono, Mauro Agate, M. Gasparo Morticelli, Elisabetta Zizzo, Agencia Estatal de Investigación (España), Sulli A., Agate M., Zizzo E., Gasparo Morticelli M., and Lo Iacono C.
- Subjects
Hazard mapping ,Marine geo-hazard ,Settore GEO/02 - Geologia Stratigrafica E Sedimentologica ,010504 meteorology & atmospheric sciences ,Geography, Planning and Development ,Submarine canyon ,010502 geochemistry & geophysics ,01 natural sciences ,Slope failure ,Peninsula ,Earth and Planetary Sciences (miscellaneous) ,0105 earth and related environmental sciences ,G3180-9980 ,geography ,geography.geographical_feature_category ,Continental shelf ,Landslide ,language.human_language ,Oceanography ,landslides, Marine geo-hazard, slope failure, southern Tyrrhenian Sea, submarine canyon ,Southern Tyrrhenian Sea ,Maps ,language ,Submarine pipeline ,Sicilian ,Geology ,Landslides - Abstract
Geomorphological Tools for Mapping Natural Hazards.-- 12 pages, 7 figures, supplemental material https://doi.org/10.1080/17445647.2020.1866703.-- Software: The geomorphological main map and the Figures in the text were compiled using GLOBAL MAPPER, Surfer and Quantum-G GIS Software and redesigned to print with Adobe Illustrator, In this paper we present geomorphological hazard mapping of the San Vito Peninsula offshore (Sicilian margin of Tyrrhenian Sea), characterised by a very narrow continental shelf and a very dipping, tectonically active continental slope, no far from a seismogenic belt. The data set consists of morpho-bathymetric models achieved by means of multibeam survey and scattered high resolution seismic profiles. The morpho-bathymetric study highlighted some potential sites of geomorphological hazards, the most representative of which are: (i) two canyons developing from the upper slope off San Vito Cape down to the Erice basin; (ii) a dense network of small incisions across the upper slope; (iii) a very active landslide, developed onland and extending in the continental shelf close to the Scopello village. The geomorphological features that can generate submarine hazard are represented by: unstable sediment packages into canyon heads or along the upper slope; submarine canyons with regressive erosion; coastal landslides, With funding from the Spanish government through the ‘Severo Ochoa Centre of Excellence’ accreditation (CEX2019-000928-S)
- Published
- 2021
6. Submarine canyon morphologies in the Gulf of Palermo (Southern Tyrrhenian Sea) and possible implications for geo-hazard
- Author
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Valeria Lo Presti, Raimondo Catalano, Fabrizio Pepe, Attilio Sulli, Mauro Agate, Claudio Lo Iacono, Lo Iacono, C, Sulli, A, Agate, M, Lo Presti, V, Pepe, F, and Catalano, R
- Subjects
Canyon ,Mass failure processe ,geography ,Mass failure processes ,geography.geographical_feature_category ,Settore GEO/02 - Geologia Stratigrafica E Sedimentologica ,Continental shelf ,Southern Mediterranean ,Anticline ,Submarine canyon ,Authigenic ,Geo-hazard ,Structural basin ,Oceanography ,Swath mapping ,Paleontology ,Geophysics ,Echo sounding ,Geochemistry and Petrology ,Submarine canyons ,Submarine pipeline ,Geology ,Seismology - Abstract
12 pages, 12 figures, 1 table., The continental shelf and the upper slope of the Gulf of Palermo (Southern Tyrrhenian Sea) in the depth interval ranging from 50 to 1,500 m were mapped for the first time with Multi Beam echosounder and high resolution seismic. Seven submarine canyons are confined to the upper slope or indent the shelf-edge and enter the Palermo intraslope basin at a depth of around 1,300 m. The canyons evolved through concurrent top-down turbiditic processes and bottom-up retrogressive mass failures. Most of the mass failure features of the area are related to canyon-shaping processes and only few of them are not confined to the upper slope. In general, these features probably do not represent a significant tsunami hazard along the coast. The geological element that controls the evolution of the canyons and induces sediment instability corresponds to the steep slope gradient, especially in the western sector of the Gulf, where the steepest canyons are located. The structural features mapped in the Palermo offshore contributed to the regulation of mass failure processes in the area, with direct faults and antiform structures coinciding with some of the canyon heads. Furthermore, the occurrence of pockmarks and highs that probably consist of authigenic carbonates above faulted and folded strata suggests a local relationship between structural control, fluid escape processes and mass failure. This paper presents a valuable high-resolution morphologic dataset of the Gulf of Palermo, which constitutes a reliable base for evaluating the geo-hazard potential related to slope failure in the area., We gratefully acknowledge the Italian National Research Projects MaGIC (Marine Geological Hazard along the Italian Coast) funded by the Italian Civil Protection Department and CARG (Geological Maps of Italy) funded by the Italian Geological Survey. We thank the captains and the crews of the R/V ‘‘Thetis’’ and R/V ‘‘Universitatis’’ for their kind assistance during the surveys. We also acknowledge the Grup de Recerca de la Generalitat de Catalunya B-CSI (2009 SGR 146).
- Published
- 2011
7. Plio-Pleistocene geological evolution of the northern Sicily continental margin (southern Tyrrhenian Sea): new insights from high-resolution, multi-electrode sparker profiles
- Author
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C. Lo Iacono, Fabrizio Pepe, Mauro Agate, A. Kok, D Di Maio, Raimondo Catalano, Attilio Sulli, Pepe, F, Sulli, A, Agate, M, Di Maio, D, Kok, A, Lo Iacono, C, and Catalano, R
- Subjects
geography ,Rift ,geography.geographical_feature_category ,High-resolution seismic profile ,Pleistocene ,Settore GEO/02 - Geologia Stratigrafica E Sedimentologica ,Continental shelf ,North Sicily offshore ,Sequence Stratigraphy ,Plio-Pleistocene ,Environmental Science (miscellaneous) ,Late Miocene ,Geotechnical Engineering and Engineering Geology ,Oceanography ,High-resolution seismic profiles ,Cefalù basin ,Paleontology ,Continental margin ,Earth and Planetary Sciences (miscellaneous) ,Transgressive ,Geology ,Holocene - Abstract
High-resolution seismic profiles were acquired in the north Sicily offshore region with an innovative, multi-tip sparker array which lacks ringing and has a base frequency around 600 Hz. The new data, combined with published data, suggest that intra-slope and extensional basins formed as a consequence of the late Miocene (?)–early Pliocene shortening and thrusting, and the middle (?)–late Pliocene continental rifting affecting the internal side of the Sicilian-Maghrebian chain. Early (?) Pleistocene to Holocene high-amplitude and high-frequency sea-level changes resulted in repeated sub-aerial exposure and flooding of the shelf, and the deposition of cyclically arranged hemipelagic and shelf sediments. An uplift of the shelf could explain the non-preservation of the transgressive and of the lowstand wedge systems tracts in the oldest sequences.
- Published
- 2003
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