Episodic, rapid sea-level rises on the central Mediterranean shelves after the Last Glacial Maximum: A review

Zecchin, Massimo; Ceramicola, Silvia; Lodolo, Emanuele; Casalbore, Daniele; Chiocci, Francesco Latino

doi:10.1016/j.margeo.2015.09.002

Cited by 44 publications

(21 citation statements)

References 73 publications

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“…The marine terraces observed at the vicinity of Al‐Hoceima likely mark several standstills during the rise of the last transgression (e.g. Rabineau et al ., ; Zecchin et al ., ). The presence of those marine terraces (noted as t on Fig.…”

Section: Seismic Facies and Morphology Of The Shelfmentioning

confidence: 97%

“…The presence of those marine terraces (noted as t on Fig. ) implies that the tectonic features at the seafloor located above 125 mbsl were subject to wave ravinement and sub‐aerial or aerial erosion since the last lowstand (Zecchin et al ., ). As a consequence, tectonic features under the 125 mbsl are likely to be less affected by erosion, but may be masked by more important sediment accumulations at the last lowstand period.…”

Section: Seismic Facies and Morphology Of The Shelfmentioning

confidence: 99%

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Evidence of quaternary transtensional tectonics in the Nekor basin (NE Morocco)

et al. 2016

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International audienceThe geodynamic processes in the western Mediterranean are driven by both deep (mantle) processes such as slab-rollback or delamination, oblique plate convergence and inherited structures. The present-day deformation of the Alboran Sea and in particular the Nekor basin area is linked to these coeval effects. The seismically active Nekor basin is an extensional basin formed in a convergent setting at the eastern part of the Rif Chain whose boundaries extend both onshore and offshore Morocco. We propose a new structural model of the Nekor basin based on high-resolution offshore data compiled from recent seismic reflection profiles, swath bathymetry acquisitions and industrial seismic reflection profiles. The new data set shows that the northern limit of the basin is oriented N49° with right-stepping faults from the Bousekkour–Aghbal fault to the sinistral Bokkoya fault zone. This pattern indicates the presence of an inherited left-lateral basement fault parallel to the major inherited Nekor fault. This fault has been interpreted as a Quaternary active left-lateral transfer fault localized on weak structural discontinuities inherited from the orogenic period. Onshore and offshore active faults enclose a rhombohedral tectonic Nekor Basin. Normal faults oriented N155° offset the most recent Quaternary deposits in the Nekor basin, and indicate the transtensional behaviour of this basin. The geometry of these faults suggests a likely rollover structure and the presence at depth of a crustal detachment. Inactive Plio-Quaternary normal faults to the east of the Ras Tarf promontory and geometries of depocentres seem to indicate the migration of deformation from east to west. The local orientations of horizontal stress directions deduced from normal fault orientations are compatible with the extrusion of the Rifian units and coherent with the westward rollback of the Tethyan slab and the localization of the present-day slab detachment or delamination

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Section: Seismic Facies and Morphology Of The Shelfmentioning

confidence: 97%

Section: Seismic Facies and Morphology Of The Shelfmentioning

confidence: 99%

Evidence of quaternary transtensional tectonics in the Nekor basin (NE Morocco)

et al. 2016

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“…Taking into account the analogy with the wave erosion depth of Ferdinandea shoal (-30 m), we can reasonably hypothesize that they were mostly eroded when sea level was at least −60/−70 m below present sea level and thus during the interstadial stillstand of the Younger Dryas (YD), a geologically short period of cold climatic conditions, which occurred between 12.8 and 11.5 ka (Muscheler et al, 2008), when sea level was 60-65 m below the present level. This stadial would have favored the development of restricted abrasion platforms in several regions worldwide (see Salzmann et al, 2013;Green et al, 2014, among others) including the Sicily Channel (Civile et al, 2015;Zecchin et al, 2015), like that recognized at about 60 m bsl on the Terribile Bank (Figures 2A,C,D). Civile et al (2015) recognized along the flanks of several sedimentary banks of the FIGURE 11 | Correlation between mean sea level curve referred to the study area (Lambeck et al, 2011) and proposed possible ages of the volcanism generating the cones of the GVF; see the text for further details.…”

Section: Relationship With Sea-level Changementioning

confidence: 94%

“…Similar features were recognized on the Anfitrite Bank at 120-130 m bsl and associated with the LGM paleo-coastal cliff by Civile et al (2015) on the basis of seismic reflection profiles. The shallowest step lying at 65-85 m bsl was interpreted by Civile et al (2018) as a NW trending currently active normal fault developed during late Miocene and later reactivated by the transpressive tectonics affecting the Terribile and Nerita Bank, although a correlation with a paleocoastal cliff related to younger stillstands during the last sea-level rise (e.g., Younger Dryas stadial) could not be ruled out (see Zecchin et al, 2015).…”

Section: Morphological Analysis Of the Terribile Bankmentioning

confidence: 99%

The Graham Volcanic Field Offshore Southwestern Sicily (Italy) Revealed by High-Resolution Seafloor Mapping and ROV Images

Cavallaro

Coltelli

2019

Front. Earth Sci.

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“…The post-LGM sea-level rise induced significant changes in the sedimentary environments of the northern Adriatic Sea with terrestrial environments transitioning in paralic and later shallow marine environments [22,[42][43][44][45][46][47][48][49][50][51][52][53][54][55][56]. In the Gulf of Trieste, where our study area is located (Figure 1), the Late Pleistocene alluvial plain transitioned into a paralic environment until open marine conditions finally prevailed approximately 10,000 years ago [22,42,44,45,[55][56][57][58][59][60][61][62][63][64].…”

Section: Settingmentioning

confidence: 99%

Sound Velocity in a Thin Shallowly Submerged Terrestrial-Marine Quaternary Succession (Northern Adriatic Sea)

Novak

Šmuc

Poglajen³

et al. 2020

Water

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Estimating sound velocity in seabed sediment of shallow near-shore areas submerged after the Last Glacial Maximum is often difficult due to the heterogeneous sedimentary composition resulting from sea-level changes affecting the sedimentary environments. The complex sedimentary architecture and heterogeneity greatly impact lateral and horizontal velocity variations. Existing sound velocity studies are mainly focused on the surficial parts of the seabed sediments, whereas the deeper and often more heterogeneous sections are usually neglected. We present an example of a submerged alluvial plain in the northern Adriatic where we were able to investigate the entire Quaternary sedimentary succession from the seafloor down to the sediment base on the bedrock. We used an extensive dataset of vintage borehole litho-sedimentological descriptions covering the entire thickness of the Quaternary sedimentary succession. We correlated the dataset with sub-bottom sonar profiles in order to determine the average sound velocities through various sediment types. The sound velocities of clay-dominated successions average around 1530 m/s, while the values of silt-dominated successions extend between 1550 and 1590 m/s. The maximum sound velocity of approximately 1730 m/s was determined at a location containing sandy sediment, while the minimum sound velocity of approximately 1250 m/s was calculated for gas-charged sediments. We show that, in shallow areas with thin Quaternary successions, the main factor influencing average sound velocity is the predominant sediment type (i.e. grain size), whereas the overburden influence is negligible. Where present in the sedimentary column, gas substantially reduces sound velocity. Our work provides a reference for sound velocities in submerged, thin (less than 20 m thick), terrestrial-marine Quaternary successions located in shallow (a few tens of meters deep) near-shore settings, which represent a large part of the present-day coastal environments.

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Episodic, rapid sea-level rises on the central Mediterranean shelves after the Last Glacial Maximum: A review

Cited by 44 publications

References 73 publications

Evidence of quaternary transtensional tectonics in the Nekor basin (NE Morocco)

Evidence of quaternary transtensional tectonics in the Nekor basin (NE Morocco)

The Graham Volcanic Field Offshore Southwestern Sicily (Italy) Revealed by High-Resolution Seafloor Mapping and ROV Images

Sound Velocity in a Thin Shallowly Submerged Terrestrial-Marine Quaternary Succession (Northern Adriatic Sea)

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