Relict sand waves in the continental shelf of the Gulf of Valencia (Western Mediterranean)

Albarracín, Silvia; Alcántara‐Carrió, Javier; Montoya-Montes, Isabel; Fontán-Bouzas, Ángela; Somoza, Luı́s; Amos, Carl L.; Salgado, Jorge Rey

doi:10.1016/j.seares.2013.12.014

Cited by 25 publications

(20 citation statements)

References 88 publications

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“…1), with heights of up to 10 m and spacing of about 200 to 1000 m Rey and Díaz del Río, 1983;Albarracín et al, 2014). These ridges are blanketed by a thin layer of modern muds but appear to be composed mainly of sand.…”

Section: Study Areamentioning

confidence: 98%

“…These ridges are blanketed by a thin layer of modern muds but appear to be composed mainly of sand. They were interpreted as inherited morphologies developed in Holocene sands and insignificantly affected by present-day processes Young et al, 1983;del Rio et al, 1986;Albarracín et al, 2014).…”

Section: Study Areamentioning

confidence: 99%

“…A deep review of the appropriate terminology is beyond the scope of this work. However, a short discussion of sand ridges, originally used by Maldonado et al (1983), sand waves, recently used by Albarracín et al (2014), and sand dunes seems pertinent. Amos and King (1984) defined a sand wave as a "composite, flow transverse, constructive bed feature, formed in medium to coarse (sized) sand or gravel, constructed and transported by the superposition and migration of megaripples.…”

Section: Sand Ridges Sand Waves or Sand Dunes?mentioning

confidence: 99%

“…The base of progradational deposits that developed the present lagoon-barrier system was dated 6250 years BP (Santisteban et al, 2009), suggesting that the deepening of the former sand bodies occurred between Younger Dryas (about 12,000 years BP) and 6250 years BP. Accordingly, Albarracín et al (2014) suggested that these ridges developed 10,000 years BP.…”

Section: Initial Development and Present-day Sediment Dynamics Of Thementioning

confidence: 99%

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Sediment dynamics over sand ridges on a tideless mid-outer continental shelf

et al. 2015

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Section: Study Areamentioning

confidence: 98%

Section: Study Areamentioning

confidence: 99%

Section: Sand Ridges Sand Waves or Sand Dunes?mentioning

confidence: 99%

Section: Initial Development and Present-day Sediment Dynamics Of Thementioning

confidence: 99%

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Sediment dynamics over sand ridges on a tideless mid-outer continental shelf

et al. 2015

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“…In general, the mechanisms responsible for the formation, mobility and stability of small-and largescale wavy sand forms have been summarized by Albarracín et al (2014). The main factors that generate and evolve such bedforms on continental shelves are: (1) the sea level position before or after the post LGM transgression, since it defines the ravinement surface and, consequently, the accumulation space; (2) dominant oceanographic processes, such as tidal currents, littoral currents, storm surges, or sediment transport due to a combination of storms and coastal currents; and (3) the current status of these features, i.e., active, relict or quasi-moribund, implying that wavy sand forms correspond either to reworked transgressive deposits or to post-transgressive active sand waves.…”

Section: Sand Dunesmentioning

confidence: 99%

High-Resolution Geomorphological Mapping of the Shallow Continental Shelf West of the Kavala Bay, North Aegean

et al. 2017

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Sediment characteristics and internal architecture of offshore sand ridges on a tideless continental shelf (western Mediterranean)

Durán

Guillén

Ribó

et al. 2020

Earth Surf Processes Landf

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An integrated approach combining swath bathymetry, an extensive dataset of vibrocores and high-resolution seismic reflection data was used to assess the origin and evolution of offshore sand ridges on a tideless continental shelf (Gulf of Valencia, western Mediterranean). The sand ridges are located in the mid-outer shelf at 55-85m water depth, obliquely oriented to the shoreline. They are 1.5 to 7m high, with a wavelength between 600 and 1,100m and a mean height-to-wavelength ratio of 0.004. The sand ridges are composed of well-sorted medium sand and are partially covered by a mud layer, evidencing a moribund stage. They overlie an erosion surface that locally crops out at the seafloor and is interpreted as the Holocene wave-ravinement surface. In the sediment cores, this surface corresponds to an erosional lag composed of coarse sand and gravel with pebbles. Small topographic irregularities on this surface are interpreted as shoreline-associated features that may act as the precursor for ridge development. Their preservation within the sand ridges could be related to the hardness of these features. Internally, the sand ridges display high-angle dipping reflections, indicating ridge migration towards the southeast in the direction of the present-day sediment transport direction. The presence of interbedded mud layers, associated with these reflections, indicates intermittent episodes of mud deposition when active. The internal architecture of some small ridges also provides new insights into their transition from an active to moribund state, as evidenced by a change in the geometry of the internal units from progradational to aggradational, finally being overlain by onlapping finer deposits over the flanks and in the troughs. The Gulf of Valencia sand ridge field constitutes a valuable potential sand resource of 22 million m 3 of well-sorted medium and coarse sand with limited mud content, which must be preserved as a strategic sand reservoir.

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Relict sand waves in the continental shelf of the Gulf of Valencia (Western Mediterranean)

Cited by 25 publications

References 88 publications

Sediment dynamics over sand ridges on a tideless mid-outer continental shelf

Sediment dynamics over sand ridges on a tideless mid-outer continental shelf

High-Resolution Geomorphological Mapping of the Shallow Continental Shelf West of the Kavala Bay, North Aegean

Sediment characteristics and internal architecture of offshore sand ridges on a tideless continental shelf (western Mediterranean)

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