| Type |
Article |
| Date |
2004-12 |
| Language |
English |
| Author(s) |
Marsset Tania , Marsset Bruno, Thomas Yannick, Cattaneo Antonio, Thereau Estelle, Trincardi F, Cochonat Pierre |
| Affiliation(s) |
IFREMER, Inst Francais Rech Exploitat Mer, F-29280 Plouzane, France.
ISMAR, CNR, I-40129 Bologna, Italy. |
| Source |
Marine Geology (0025-3227) (Elsevier), 2004-12 , Vol. 213 , N. 1-4 , P. 73-89 |
| DOI |
10.1016/j.margeo.2004.10.002 |
| WOS© Times Cited |
18 |
| Keyword(s) |
Bottom hugging currents, Sediment deformation, 3D VHR seismic, Adriatic shelf, Late Holocene |
| Abstract |
Very High Resolution (VHR) 3D seismic data were collected on the Adriatic shelf offshore the city of Ortona in order to define the small-scale geometric complexity of late Holocene deposits. Three groups of units are distinguished from the bottom up: (1) units U1 to U3 forming the Transgressive System Tract (TST); (2) units U4 and U5 representing the condensed interval deposited on the Maximum flooding surface (MFS) and the basal unit of the High stand System Tract (HST); and (3) U6 to U 10 forming the progradational units of the HST. The muddy HST deposits show seafloor and subsurface sedimentary features over up to 40% of its extent on the Adriatic shelf. In the area offshore Ortona, the HST shows shore-parallel undulations in water depth of ca. 30-70 m and mud reliefs in water depth of ca. 70-110 m. The mud reliefs are subcircular in plan view and occur in swarms, perpendicular to the regional contour, that are connected to each other by shore-parallel junctions. The genesis of these features is interpreted as a combination of two different mechanisms: (1) sediment deformation in relation with the condensed section; and (2) depositional process related to shore-parallel currents interacting with topographic irregularities. The evolution of the HST sedimentary pattern is closely related to a "key unit" (U5) that influences both the seaward transition from linear to complex features and the stacking pattern. |
| Full Text |
| File |
Pages |
Size |
Access |
| publication-496.pdf |
19 |
2 MB |
Open access |
|
