Please use this identifier to cite or link to this item:
Full metadata record
DC FieldValueLanguage
dc.contributor.authorUrgeles Esclasans, Roger-
dc.contributor.authorDe Mol, Ben-
dc.contributor.authorLiquete García, Camino-
dc.contributor.authorCanals Artigas, Miquel-
dc.contributor.authorDe Batist, Marc-
dc.contributor.authorHughes-Clarke, John E.-
dc.contributor.authorAmblàs i Novellas, David-
dc.contributor.authorArnau, Pedro A.-
dc.contributor.authorCalafat Frau, Antoni-
dc.contributor.authorCasamor Bermúdez, José Luis-
dc.contributor.authorCentella, Víctor-
dc.contributor.authorDe Rycker, Koen-
dc.contributor.authorFabrés Francés, Joan-
dc.contributor.authorFrigola Ferrer, Jaime I.-
dc.contributor.authorLafuerza, Sara-
dc.contributor.authorLastras Membrive, Galderic-
dc.contributor.authorSànchez Vidal, Anna-
dc.contributor.authorZuñiga, Diana-
dc.contributor.authorVersteeg, Wim-
dc.contributor.authorWillmott Puig, Verónica-
dc.description.abstractA field of sediment undulations has been mapped by means of high resolution multibeam bathymetry and seismic reflection profiles in the Llobregat River prodelta, off the city of Barcelona, Catalonia, Spain. Similar features had previously been recognized in other prodelta environments and interpreted either as downslope sediment deformation or sedimentary structures induced by bottom currents or hyperpycnal flows. Since the study area is undergoing significant offshore development, proper interpretation of such sediment undulations is needed for a correct risk assessment. The occurrence of the sediment undulations is restricted to the prodelta front on slope gradients between 3 and 0.2º. The undulations have developed at the edge and atop an area of gas bearing sediments within the Late-Holocene high-stand mud wedge. An evaluation is made of the characteristics of the sediment undulations in order to determine the most likely process for the origin of these structures. Amongst these characteristics are the continuity of the reflections and lack of diffractions in between different undulations, their size distribution (large to small) both from shallow to deep and with depth in section, the asymmetry (decreasing from proximal to distal), the crest to trough vertical distance on the landward side of the undulations (up to 0.5 m), and the lack of features that could indicate a progressive movement such as growth structures and drag folds. These characteristics indicate that the sediment undulations on the Llobregat River prodelta do not result from sediment deformation, but rather from the interaction of bottom currents generated by hyperpycnal flows from the Llobregat River with regional sea water circulation. Their identification as sediment waves implies that such features do not pose a major hazard for urther offshore development.-
dc.publisherAmerican Geophysical Union-
dc.relation.isformatofReproducció del document publicat a:
dc.relation.ispartofJournal of Geophysical Research, 2007, vol. 112, p. B05102-
dc.rights(c) American Geophysical Union, 2007-
dc.subject.classificationSediments fluvials-
dc.subject.classificationLlobregat, Delta del (Catalunya))-
dc.subject.otherRiver sediments-
dc.subject.otherLlobregat River Delta (Catalonia)-
dc.titleSediment undulations on the Llobregat prodelta: Signs of early slope instability or sedimentary bedforms?-
Appears in Collections:Articles publicats en revistes (Dinàmica de la Terra i l'Oceà)

Files in This Item:
File Description SizeFormat 
543214.pdf2.34 MBAdobe PDFView/Open

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.