Els filtres actuals son: Any inici = 2015, Any final = 2020
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Durán R., Guillén J., Simarro G. (2019)
X Jornadas de Geomorfología Litoral, 4-6 de septiembre de 2019, Castelldefels. Ed. R. Durán, J. Guillén, G. Simarro. DOI: 10.20350/digitalCSIC/8956. ISBN. 978-84-09-12002-4. (BibTeX: duran.etal.2019b)
Resum: Veure
Desde el año 2000 y con carácter bienal, la comunidad científica dedicada a la Geomorfología Litoral viene reuniéndose con el objetivo de compartir sus avances y dar a conocer de primera mano (mediante charlas, pósteres y salidas de campo) los últimos resultados de su investigación, nuevos casos de estudio, avances técnicos y experiencias de gestión litoral. Alcanzar la décima edición de las Jornadas demuestra que somos una comunidad muy activa y consolidada, consciente de que nuestra aportación es relevante para afrontar los retos que nuestra sociedad tiene que abordar para facilitar una adecuada transformación de la zona costera durante las próximas décadas. [...]
Terrinha P., Ramos A., Neres M., Valadares V., Duarte J., Martínez-Loriente S., Silva S., Mata J., Kullberg J.C., Casas-Sainz A., Matias L., Fernández O., , Ribeiro C., Font E., Neves C., Roque C., Rosas F., Pinheiro L., Bartolomé R., Sallarès V., Magalhães V., Medialdea T., Somoza L., Gràcia E., Hensen C., Gutscher M.-A., Ribeiro A., Zitellini N. (2019)
The Geology of Iberia: A Geodynamic Approach. In: Regional Geology Reviews 2364-6438. Ed. C. Quesada, J.T. Oliveira. Springer. ol. 3, Chap. 11. 487-505. DOI: 10.1007%2F978-3-030-11295-0_11. ISBN. 978-3-030-11295-0. (BibTeX: terrinha.etal.2019a)
Resum: Veure
The Alpine orogeny is well recorded onshore and offshore by tectonic inversion of the Mesozoic rift basins. Large scale linear seamounts (more than 250 km long and with up to 5 km of uplift) involving oceanic and continental lithosphere were carried on top of thrusts, such as the Gorringe seamount and the Estremadura Spur in the SouthWest and West Iberia Margin, respectively. The SouthWest Iberia Margin also recorded the westward migration of the Gibraltar Oceanic slab as the westwards propagation of the Neo-Tethys subduction. Rotation of the tectonic compression from NW-SE to WNW-ESE in Pliocene times caused the development of large scale dextral wrench faults as the present day Africa-Iberia plate boundary. Neotectonics of this plate boundary caused large to mega-scale destructive earthquakes and tsunamis.
695 Kb
Durán R., Guillén J. (2018)
Submarine Geomorphology. Ed. A. Micallef, S. Krastel, A. Savini. Springer. 185-206. DOI: 10.1007/978-3-319-57852-1_11. ISBN. 978-3-319-57851-4. (BibTeX: duran.guillen.2018a)
Resum: Veure
Continental shelves comprise the zone adjacent to the continents, extending from the infralittoral to a marked change in slope known as the shelf break. The shelf break is located at a variable depth from 20 to 550 m, with a global average depth of 140 m. They develop in passive and active margins and can be dominated by different processes, which include tides, waves and currents. The present day geomorphology of the continental shelf comprises a wide variety of modern and relict features as a result of different controlling factors—geological structure, sea-level change, and sediment delivery and dispersal systems—acting at varying time scales. This chapter illustrates the most common landforms observed in siliciclastic continental shelves, with special attention to the processes that generate them. Landforms include consolidated bottoms, erosive morphologies, prograding landforms, bedforms, gas-related morphologies and anthropogenic features.
504 Kb
Salat J., Puig P., Flexas M., Balbin R., Sabatés A., Pascual J. (2018)
11 Congreso Internacional AEC. Cartagena 17-19 octubre 2018. Publicaciones de la Asociación Española de Climatología. (BibTeX: salat.etal.2018)
Resum: Veure
Desde el invierno de 2013, no se han observado episodios relevantes de formación de aguas profundas en el Mediterráneo Occidental. Ello podría estar relacionado con la suavidad de estos últimos inviernos. No obstante, en 2018 sí ha habido episodios fríos importantes para producir aguas densas, pero no suficientes como para lograr cantidades significativas de nueva agua profunda. En la presente comunicación se plantea la posibilidad de que desde el agotamiento del agua profunda anterior al 2005 en toda la cuenca, en 2015 como más tarde, la formación de nueva agua profunda requiera unas pérdidas de calor latente superiores a las necesarias anteriormente. Este requerimiento, junto a la tendencia global al calentamiento podría causar un debilitamiento de la circulación termohalina mediterránea, con diversas consecuencias a escala regional y global. Entre ellas, una disminución de los intercambios de agua con el Océano y de los niveles de oxígeno en aguas profundas.
Paraules clau: Formación de aguas profundas, inviernos suaves, Mediterráneo Noroccidental, Cambio climático
489 Kb
Bardaji R., Piera J., Bartolomé R., Dañobeitia J., García O. (2017)
Proceedings OCEANS 2017 - Anchorage. ISBN. 978-069294690-9. (BibTeX: bardaji.etal.2017b)
Resum: Veure
User friendly tools strongly influence the use of scientific measurements from marine observatory platforms. Nowadays, because of the huge amount of marine data, available in many different formats, automate methodologies are required to effectively reduce the human effort. This work presents oceanobs, an open-source Python package that provides a wide range of tools to analyze data from marine observatories, including procedures for feature extraction, quality control generation, filtering methods and content visualization. Here we present the philosophy of implementation of the package and we focus on the data Quality Control production.
Paraules clau: Oceanography; Python; QC; Marine data; Data science
715 Kb
Demestre M., Muntadas A., Duran R., García-de-Vinuesa A., Sánchez P., Mas J., Franco I., Muñoz A., Guillén J. (2017)
Atlas of Bedforms in the Western Mediterranean. Ed. J. Guillén, J. Acosta, F.L. Chiocci, A. Palanques. Springer. Chap. 32. 207-214. DOI: 10.1007/978-3-319-33940-5_32. ISBN. 978-3-319-33938-2. (BibTeX: demestre.etal.2017a)
Resum: Veure
Multibeam swath bathymetry, sediment and benthos samples (including both epifauna and infauna) and submarine images were explored to characterize benthic communities in a subaqueous dune field on the Mar Menor middle shelf (western Mediterranean). The dunes are 2–5 m high and spaced 400–1100 m apart, with a predominant NE-SW orientation oblique to the shoreline. The benthic communities show high spatial variability in diversity. Three types of habitat showing a different species composition are distinguished in the subaqueous dune field.
Paraules clau: Benthic communities, Bedforms, Epifauna, Infauna, Middle shelf, Mediterranean
449 Kb
Demestre M., Muntadas A., Sanchez P., Garcia-de-Vinuesa A., Mas J., Franco I., Duran R., Guillén J. (2017)
Atlas of Bedforms in the Western Mediterranean. Ed. J. Guillén, J. Acosta, F.L. Chiocci, A. Palanques. Springer. Chap. 33. 215-219. DOI: 10.1007/978-3-319-33940-5. ISBN. 978-3-319-33938-2. (BibTeX: demestre.etal.2017c)
Resum: Veure
Maërl habitats are of great biological value due to their high biodiversity and productivity, but they are also very fragile. The subaqueous dune field on the continental shelf off the Mar Menor exhibits sediment characteristics that favour the presence of maërl habitats. However, this seabed is altered by two kinds of disturbance: biogenic disturbance caused mainly by the feeding and burrowing activities of the sea urchin Spatangus purpureus, and anthropogenic disturbance caused by trawling activities.
Paraules clau: Bedforms, Habitat stability, Biodiversity conservation, Bioturbation, Trawling, Mediterranean
2.15 Mb
Durán R., Alonso B., Ercilla G., Estrada F., Casas D., Muñoz A. (2017)
Atlas of Bedforms in the Western Mediterranean. Ed. J. Guillén, J. Acosta, F.L. Chiocci, A. Palanques. Springer. Chap. 22. 135-141. DOI: 10.1007/978-3-319-33940-5_22. ISBN. 978-3-319-33938-2. (BibTeX: duran.etal.2017b)
Resum: Veure
The dynamics of sorted bedforms on the inner shelf off El Masnou coast (NW Mediterranean) was investigated based on time-series of swath bathymetry and backscatter and grain-size analysis of grab samples spanning 4 years (2006–2009). The sorted bedforms are superimposed on the edge of a shallow infralittoral wedge with an orientation nearly perpendicular to the slope and oblique to the shoreline. They commonly display lateral asymmetry in backscatter, with the high backscatter domain on the depression and on the eastern side of the bedforms. The short-term evolution of these bedforms evidenced changes in the location of the bedform boundaries, widening and narrowing, predominant migration towards the southwest in the direction of the net alongshore sediment transport, and formation of new sorted bedforms. The analysis of repeated bathymetries also revealed the impact of dredging activities on the sorted bedforms, resulting in the destruction of part of the bedform pattern, which started to recover over the subsequent months. This behaviour suggests that the sorted bedforms off El Masnou are persistent and dynamic over a 4 year time span
Paraules clau: Sorted bedforms, Bedform dynamics, Anthropogenic impact, Inner shelf, NW Mediterranean
651 Kb
Durán R., Guillén J., Muñoz A. (2017)
Atlas of Bedforms in the Western Mediterranean. Ed. J. Guillén, J. Acosta, F.L. Chiocci, A. Palanques. Springer. Chap. 21. 127-133. DOI: 10.1007/978-3-319-33940-5_21. ISBN. 978-3-319-33938-2. (BibTeX: duran.etal.2017d)
Resum: Veure
Multibeam echosounder data and sediment samples were used to characterize sorted bedforms on the inner shelf off Lloret and Tossa de Mar (NW Mediterranean Sea). The sorted bedforms are formed by a sequence of coarse-grained (coarse sand) and fine-grained (fine to medium sand) domains, with little topographic relief (up to 1 m). They exhibit elongated shapes and are oriented nearly perpendicular to the shoreline, at water depths ranging from 10 to 40 m. The sorted bedforms display lateral symmetry in backscatter and bathymetric relief with high backscatter centred on the bathymetric depression. They appear associated with elongated sand deposits fed by short, ephemeral streams that extend across-shelf over the infralittoral prograding wedge down to 40 m water depth. Sorted bedforms are better developed in deeper waters (20–40 m), probably due to stronger hydrodynamic conditions in the shallower sector of the shelf, which prevent the development or maintenance of these morphological features. The morphological evolution of these bedforms indicates that they are persistent features, showing small changes in their boundaries over a decadal timescale.
Paraules clau: Persistent sorted bedforms, Bedform evolution, Inner shelf, Ephemeral streams, NW Mediterranean
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Durán R., Guillén J., Rivera J., Muñoz A., Lobo F.J., Fernández-Salas L.M., Acosta J. (2017)
Atlas of Bedforms in the Western Mediterranean. Ed. J. Guillén, J. Acosta, F.L. Chiocci, A. Palanques. Springer. Chap. 29. 187-192. DOI: 10.1007/978-3-319-33940-5_29. ISBN. 978-3-319-33938-2. (BibTeX: duran.etal.2017f)
Resum: Veure
Multibeam swath bathymetry, high-resolution seismic data and sediment samples were used to characterize a field of sand ridges and subaqueous dunes on the outer Murcia continental shelf (western Mediterranean Sea). Sand ridges are 1.5–3 m high and show a predominant E-W orientation oblique to the present-day shoreline. High-resolution seismic data reveal a backstepping stacking pattern of high-angle clinoforms dipping towards the southwest, interpreted as buried sand bodies. Subaqueous dunes have a mean height of 0.3 m and appear superimposed on the sand ridges showing a NW-SE orientation oblique to the ridges. They are composed of sandy sediments and display asymmetric morphology, with the lee side towards the southwest. Ridge and dune asymmetry and internal structure are indicative of long-term sediment transport towards the southwest. At present, dune migration rates deduced from repeated bathymetric surveys indicate that the dunes remain stationary or migrate at very low rates on a decadal scale.
Paraules clau: Sand ridges, Subaqueous dunes, Tideless continental shelf, Western Mediterranean sea
340 Kb
Guerrero Q., Guillén J., Durán R., Urgeles R. (2017)
Atlas of Bedforms in the Western Mediterranean. Ed. J. Guillén, J. Acosta, F.L. Chiocci, A. Palanques. Springer. Chap. 15. 89-93. DOI: 10.1007/978-3-319-33940-5_15. ISBN. 978-3-319-33938-2. (BibTeX: guerrero.etal.2017a)
Resum: Veure
High-resolution multibeam bathymetry, bottom sediment samples and time series of current intensities and directions were collected over a dune field in the Ebro Delta coastal area. Aerial photographs were used to analyse the morphological changes of the river mouth since 1946. The bathymetry show a ~6.4 km2 dune field located at a water depth of 6–15 m, with dunes of 1.3 m median height and 250 m median wavelength. The location of the dune field coincides partially with a former river mouth, an area that emerged in 1946. Onset of dune field development is believed to have started in the 1940s, when the Cape Tortosa river mouth was abandoned and the shoreline underwent a severe retreat. Currently, the recorded high-energy current events induced by northwesterly winds result in a dynamic seabed over the dunes, including ripple development, suggesting that the dune field is active mostly during these high-energy periods.
Paraules clau: Subaqueous dune field development, Coastal retreat, Deltaic area, Present-day dynamics
Guillén J., Acosta J., Chiocci F.L., Palanques A. (2017)
Atlas of Bedforms in the Western Mediterranean. Ed. J. Guillén, J. Acosta, F.L. Chiocci, A. Palanques. Springer. 1-307. DOI: 10.1007/978-3-319-33940-5. ISBN. 978-3-319-33938-2. (BibTeX: guillen.etal.2017a)
Resum: Veure
This atlas illustrates the characteristics of present-day bedforms, from the shoreline to deep-sea environments, and it also includes short reviews of the main mechanisms that generate such bedforms. The atlas is aimed at the research community, in addition to students, the public at large and companies with interests in the marine environment. The book is divided into seven sections composed of a number of short chapters: 1) bedform analysis and the main physical processes, 2) bedforms in the coastal zone, 3) bedforms on prodeltas and sorted bedforms, 4) bedforms on the continental shelf, 5) bedforms and benthos, 6) bedforms in submarine canyons and 7) slope and deep-sea bedforms. This atlas offers a comprehensive, though not exhaustive, view of the diversity of bedforms and associated processes and of the morphological and temporal scales in the enclosed tideless western Mediterranean Sea.
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Lo Iacono C., Guillén J. (2017)
Atlas of Bedforms in the Western Mediterranean. Ed. J. Guillén, J. Acosta, F.L. Chiocci, A. Palanques. Springer. Chap. 20. 121-126. DOI: 10.1007/978-3-319-33940-5_20. ISBN. 978-3-319-33938-2. (BibTeX: loiacono.guillen.2017a)
Resum: Veure
The analysis of sidescan sonar data and sediment samples around the Egadi Islands, on the NW Sicilian margin (southern Tyrrhenian), revealed the existence of two main sorted bedform fields. Sorted bedforms were mapped along the shelf sectors of the Marettimo and Favignana Islands, organized on elongated patches almost perpendicular to the coastline for a depth range of 15–50 m. Sediment sampling revealed that the bedforms are composed of sandy sediments lying over coarse sandy, gravelly and pebbly substrates. We assessed the long-term stability of the sorted bedforms, which could be related to along-shore transverse bottom currents associated with exceptional storms coming from the NE.
Paraules clau: Sorted bedforms, Inner shelf, Sidescan sonar, Egadi insular margin, Tyrrhenian sea
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Mas J., Franco I., Demestre M., Guillén J., J. Murcia F, Ruiz J.M. (2017)
Atlas of Bedforms in the Western Mediterranean. Ed. J. Guillén, J. Acosta, F.L. Chiocci, A. Palanques. Springer. Chap. 31. 199-206. DOI: 10.1007/978-3-319-33940-5_31. ISBN. 978-3-319-33938-2. (BibTeX: mas.etal.2017b)
Resum: Veure
Benthic communities on shallow sedimentary bottoms in the western Mediterranean can play a crucial role in the development, maintenance and evolution of bedforms. This chapter presents an overview of the most characteristic benthic communities in shallow waters classified by the type of substrate: coarse bottoms, sandy bottoms and fine-grained bottoms. Examples from the Murcia continental shelf are provided to illustrate the main communities, giving special emphasis to the seagrass beds (some of them endemic to the Mediterranean) and the scarce maërl community, both with high biodiversity and ecological value.
Paraules clau: Bedforms, Coastal zone, Benthic communities, Maërl, Posidonia meadows, “Soft” and “hard” bottoms
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Ribó M., Durán R., Puig P., Van Rooij D., Guillén J. (2017)
Atlas of Bedforms in the Western Mediterranean. Ed. J. Guillén, J. Acosta, F.L. Chiocci, A. Palanques. Springer. Chap. 40. 259-264. DOI: 10.1007/978-3-319-33940-5_40. ISBN. 978-3-319-33938-2. (BibTeX: ribo.etal.2017a)
Resum: Veure
Recently acquired swath bathymetry and seismic datasets on the Gulf of Roses continental slope revealed the presence of large sediment waves that have developed between ~200 and ~400 m water depth. Geometric parameters were computed from the multibeam dataset and the obtained results showed mean sediment wave lengths of ~2000 m and maximum heights of ~60 m. The analysis of seismic profiles showed the general architecture of the Late Quaternary deposits over the Gulf of Roses outer shelf and slope. The outer continental shelf is characterized by morphological erosional features affecting the upper part of the most recent seismic unit. Over the continental slope five main unconformity-bounded seismic units are differentiated, with sediment waves developed in all of them. The sediment waves observed over the continental slope are presumably generated by bottom currents intensified during major dense shelf water cascading events flowing downslope at an oblique angle with respect to the main bathymetry.
Paraules clau: Sediment waves, Continental slope, NW Mediterranean sea, Dense shelf water cascading
495 Kb
Ribó M., Puig P., Muñóz A., Lo Iacono C., Masqué P., Palanques A., Acosta J., Guillén J., Gómez Ballesteros M. (2017)
Atlas of Bedforms in the Western Mediterranean. Ed. J. Guillén, J. Acosta, F.L. Chiocci, A. Palanques. Springer. Chap. 41. 265-271. DOI: 10.1007/978-3-319-33940-5_41. ISBN. 978-3-319-33938-2. (BibTeX: ribo.etal.2017c)
Resum: Veure
Recently acquired swath bathymetry, high-resolution seismic profiles and bottom sediment samples have revealed the presence of large-scale fine-grained sediment waves over the Gulf of Valencia continental slope. Like many other deep-water sediment waves, these features were previously attributed to gravitational slope failure related to creep-like deformation, and have now been reinterpreted as sediment wave fields extending from 250 m depth to the continental rise at ~850 m depth. Sediment wave lengths range between 500 and 1000 m and maximum wave heights of up to 50 m are found on the upper slope, decreasing downslope to a minimum height of 2 m. Seismic profiles showed continuous internal reflectors and several sediment wave packages were differentiated, being thicker on the crest of each wave and thinner on the downslope flank, indicating that these sediment waves are upslope-migrating. The sediment wave formation process was inferred from contemporary hydrodynamic observations, and internal wave activity is suggested to be the most probable mechanism for the sediment transport and deposition and subsequent maintenance of the sediment waves over the Gulf of Valencia continental slope.
Paraules clau: Sediment waves, Continental slope, Gulf of valencia, Internal waves
417 Kb
Simarro G., Guillén J., Puig P., Ribó M., Lo Iacono C., Palanques A., Muñoz A., Durán R., Acosta J. (2017)
Atlas of Bedforms in the Western Mediterranean. Ed. J. Guillén, J. Acosta, F.L. Chiocci, A. Palanques. Springer. Chap. 27. 173-177. DOI: 10.1007/978-3-319-33940-5_27. ISBN. 978-3-319-33938-2. (BibTeX: simarro.etal.2017c)
Resum: Veure
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 high-resolution seismic reflection profiling and sediment sampling. Boundary layer hydrodynamic and suspended sediment concentration measurements conducted over a sand ridge at 66 m depth showed evidence of wave and current sediment resuspension during a major storm event. It is argued that these sand ridges developed in a shallow environment and there is no evidence of present-day ridge migration or morphological degradation.
Paraules clau: Bedforms, Sand ridge, Sediment resuspension, Continental shelf
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Gutt J., Cummings V., Dayton P., Isla E., Jentsch A., Schiaparelli S. (2016)
Marine Animal Forests : The Ecology of Benthic Biodiversity Hotspots. Ed. S. Rossi, L. Bramanti, A. Gori, C. Orejas Saco del Valle. Springer. 1-30. DOI: 10.1007/978-3-319-17001-5_8-1. ISBN. 978-3-319-17001-5. (BibTeX: gutt.etal.2016a)
Resum: Veure
Both Southern Ocean and terrestrial systems contain three-dimensional biotic components that are key in shaping and defining their respective ecosystems and communities. Antarctic suspension-feeding communities, which inhabit the shelf of the Southern Ocean, resemble “Terrestrial Vegetation Forests” (TVF) or shrublands and support the concept of “Antarctic Marine Animal Forests” (AMAF). They comprise mostly sessile animals, provide microniches for an associated mobile fauna, and are fragmented and regionally mixed with other communities. On land, only high mountains and very dry regions are unsuitable for TVF, analogous to the virtual absence of AMAF from the deep sea (>1000 m). Besides fundamental differences between these systems in energy flow and other ecological drivers such as light requirements and dispersal opportunities, both “forests” experience similar disturbances, which impact ecosystem dynamics and diversity in similar ways. While land use affects and reduces terrestrial forests, climate change and fishing impacts are the most serious threats to the Southern Ocean ecosystem. Research priorities for a better understanding of “Antarctic Marine Animal Forests” demand (1) mapping biotic communities and their structural and functional diversity, especially in terms of hot and cold spots; (2) understanding ecological function, including ecosystem productivity and dynamics; (3) cross-system comparison to identify generality or uniqueness in ecosystem structure and dynamics; and (4) implication of existing and new research approaches and conservation strategies.
Paraules clau: Limiting factors, ecological drivers, areal coverage, three-dimensional structure, interactions, energy, flow, disturbance, climate change, conservation
691 Kb
Isla E. (2016)
Source-to-Sink Fluxes in Undisturbed Cold Environments. Ed. A.A. Beylich, J.C. Dixon, Z. Zwoliński. Cambridge University Press. Chap. 16. 199-212. ISBN. 9781107068223. (BibTeX: isla.2016c)
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Toma D.M., del Rio J., Cadena J., Bghiel I., Martínez E., , , Dañobeitia J., Sorribas J., Casas R., Piera J., Bartolome R., Bardaji R. (2016)
Proceedings of the Geospatial Sensor Webs Conference 2016. Ed. S. Jirka , C. Stasch, A. Hitchcock. (BibTeX: toma.etal.2016b)
Resum: Veure
he EMSODEV[1] (European Multidisciplinary Seafloor and water column Observatory DEVelopment) is an EU project whose general objective is to set up the full implementation and operation of the EMSO distributed Research Infrastructure (RI), through the development, testing and deployment of an EMSO Generic Instrument Module (EGIM). This research infrastructure will provide accurate records on marine environmental changes from distributed local nodes around Europe. These observations are critical to respond accurately to the social and scientific challenges such as climate change, changes in marine ecosystems, and marine hazards. In this paper we present the design and development of the EGIM data acquisition system. EGIM is able to operate on any EMSO node, mooring line, sea bed station, cabled or non-cabled and surface buoy. In fact a central function of EGIM within the EMSO infrastructure is to have a number of ocean locations where the same set of core variables are measured homogeneously: using the same hardware, same sensor references, same qualification methods, same calibration methods, same data format and access, and same maintenance procedures.
Paraules clau: EMSO; data acquisition; EMSODE; EGIM; OGC;SOS; SE; SWE; Sensor; Zabbix
1.34 Mb
Durán R., Guillén J., Simarro G., Ribó M., Puig P., Muñoz A., Palanques A. (2015)
The Proceedings of the Coastal Sediments 2015. Ed. P. Wang, J.D. Rosati, J. Cheng. World Scientific Publishing. DOI: 10.1142/9789814689977_0111. ISBN. 978-981-4689-98-4. (BibTeX: duran.etal.2015a)
Resum: Veure
An extensive dataset of vibrocores and high-resolution seismic data allowed characterizing a sand ridge field in the Valencia mid-outer shelf. Sediment coring revealed a layer of coarse sand to gravel with pebbles corresponding with the basal reflector which is identified in the seismic profile and interpreted as the Holocene ravinement surface. Internally, the sand ridges displays medium to high-angle dipping reflectors indicating long-term migration towards the southeast, in the direction of present-day sediment transport. In addition, the occurrence of interbedded mud layers within the ridge sand unit, together with the dipping internal reflectors suggests episodic ridge migration and reactivation. The internal structure of small sand ridges also provides additional information about the mechanisms of ridge degradation. Regarding to the use of the Valencia sand ridges as potential borrow area, it was identified a sand deposit of 22·million m of relatively well-sorted medium and coarse sand with a limited mud content, that must be preserved as strategic sand reservoir.
10.54 Mb
Palomino D., Alonso B., Lo Iacono C., Casas D., d\'Acremont E., Ercilla G., Gorini C., Vázquez J.-T. (2015)
Atlas of the Mediterranean Seamounts and Seamount-like Structures. Ed. M. Würtz, M. Rovere. IUCN. Chap. 1. 19-55. ISBN. 978-2-8317-1750-0. (BibTeX: palomino.etal.2015a)