6533b82bfe1ef96bd128cd8f
RESEARCH PRODUCT
Potential Cyclic Steps in a Gully System of the Gulf of Palermo (Southern Tyrrhenian Sea)
Elisabetta ZizzoMatthieu J.b. CartignyClaudio Lo IaconoAttilio SulliMauro Agatesubject
Canyongeographygeography.geographical_feature_categoryTurbidity currentBedformSettore GEO/02 - Geologia Stratigrafica E Sedimentologica010504 meteorology & atmospheric sciencesCyclic steps Gullies Submarine Canyons Turbidity Currents Gulf of Palermo Tyrrhenian SeaSubmarine canyonStructural basin010502 geochemistry & geophysics01 natural sciencesThalwegBathymetryGeomorphologyGeology0105 earth and related environmental sciencesdescription
Multibeam bathymetric data revealed the occurrence of atrain of bedforms along a gully system in the Gulf of Palermo, Southern Tyrrhenian Sea. The observed gullies, located in the westernmost sector of the Gulf of Palermo, incise the outer shelf at a depth of 120 m and converge at the Zafferano Canyon, connecting to the Palermo Basin at a the depth of 1300 m. Bedforms develop along these gullies and along the thalweg of the canyon, displaying an average wavelength of 200 m, with maximum values of 340 m. Their gully floor location combined with their wave length, upslope asymmetry and crescent shape point to a possible cyclic steporigin of these bedforms. Preliminary numerical modeling suggest that, assuming that these bedforms were formed by cyclic steps in turbidity currents, these flows might have been few meters thick and have had velocities in the range of 0.2-1.5 m/s.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2016-09-24 |