Morphology of retrogressive failures in the Eastern Rhone interfluve during the last glacial maximum (Gulf of Lions, Western Mediterranean)

Badhani, Shray; Cattaneo, Antonio; Dennielou, Bernard; Leroux, Estelle; Colin, Florent; Thomas, Y.; Jouet, Gwénaël; Rabineau, Marina; Droz, Laurence

doi:10.1016/j.geomorph.2019.106894

Cited by 16 publications

(21 citation statements)

References 86 publications

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“…7). This suggests that RWMTD is not very homogenous as previously thought based on transparent seismic facies and that the degree of sediment disintegration in the proximal area is most likely lower than previously considered (Badhani et al 2019;Dennielou et al 2019). One can argue that the degree of sediment disintegration increases as the MTD propagated further downslope such as in the case of the Big'95 debris flow (Lastras et al 2005).…”

Section: Internal Structure Of Mass Movement Products In the Golmentioning

confidence: 63%

“…Within the GoL, immediately at the foot of the slope, two large submarine landslides, the ERIS and the Western Slide have been recognized and investigated by Bellaiche et al (1986), Droz et al (2006), Dennielou et al (2019 and Badhani et al (2019). The ERIS extends from the shelf break (~120 m) to the water depths 1500 m on the eastern side of the PRC (Badhani et al 2019), and Western Slide complex extends from 1800 m to 2300 m on the western side of the PRC (Dennielou et al 2019). The ERIS consists of successive headwall scarps of 30-120 m height aligned in a staircase style and the Western landslide consists of several scarps parallel to the slope whose heights reach 50-100 m (Fig.…”

Section: Geological Settingmentioning

confidence: 99%

“…The resulting deposits, the REMTD and RWMTD have surface areas exceeding 6500 km 2 , volumes greater than 100 km 3 and an extremely long run out of more than 200 km (Droz et al 2006). Both landslides occurred during the peak of the last glacial maximum (21 ka cal BP) suggesting a common trigger behind the failure (Badhani et al 2019;Dennielou et al 2019). Badhani et al (2019) showed repeated slope failures above high-amplitude horizons at different stratigraphic levels, indicating control of specific sediment type on the failure.…”

Section: Geological Settingmentioning

confidence: 99%

“…-Lithofacies L1 is composed of light grey foraminifera and calcareous nanoplankton oozes that correspond to hemipelagic-pelagic sedimentation during the sea level highstands (Badhani et al 2019;Dennielou et al 2019).…”

Section: Sediment Coresmentioning

confidence: 99%

“…1). The two main submarine landslides present in the GoL are the Eastern Rhône Interfluve Slide (ERIS, Badhani et al 2019) and an unnamed slide complex on the western side of the Petit Rhone Canyon (PRC, Dennielou et al 2019) that we refer to as the Western Slide in this paper.…”

mentioning

confidence: 99%

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Integrated geotechnical, sedimentological and geophysical investigation of seafloor instabilities in the Gulf of Lions Western Mediterranean

Badhani¹,

Cattaneo²,

Collico³

et al. 2020

Preprint

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The Gulf of Lions presents recurring mass-transport deposits (MTDs) within the Plio-Quaternary sediments suggesting a long history of mass movements. The two large, surficial MTDs are located on the eastern and western levee of the Rhone canyon over an area exceeding 6000 km 2 and volumes exceeding 100 km 3 . Both MTDs were emplaced 21 ka ago (peak of the Last Glacial Maximum), suggesting a common trigger. Here, we present a multidisciplinary high-resolution geophysical, sedimentological and in-situ geotechnical study of the source and deposit areas of both MTDs to characterise distinct expressions of sediment deformation as well as their spatial and chronological distributions. We show the internal structure of mass movements and resulting MTDs with unprecedented details that were previously represented in the conventional seismic data as transparent and chaotic facies. The combination of multidisciplinary approaches shows new insights into the nature of basal surfaces of the slope failures. In particular, we show that the basal surfaces of the failures consist of clay-rich material contrasting with the overlying turbiditic deposits, suggesting that a strong lithological heterogeneity exists within the strata. We suggest that this change in lithology between clay-rich sediments and turbiditic sequences most likely control the localisation of weak layers and landslide basal surfaces.

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Section: Internal Structure Of Mass Movement Products In the Golmentioning

confidence: 63%

Section: Geological Settingmentioning

confidence: 99%

Section: Geological Settingmentioning

confidence: 99%

Section: Sediment Coresmentioning

confidence: 99%

mentioning

confidence: 99%

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Integrated geotechnical, sedimentological and geophysical investigation of seafloor instabilities in the Gulf of Lions Western Mediterranean

Badhani¹,

Cattaneo²,

Collico³

et al. 2020

Preprint

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Multidisciplinary Study of Marine Archives: Reconstruction of Sea-Level, Sediment Yields, Sediment Sources, Paleoclimate, Paleoceanography and Vertical Movement on Margins: Examples from the Western Mediterranean Sea

Rabineau¹,

Pellen

Pasquier³

et al. 2022

Advances in Science, Technology &Amp; Innovation

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The numerous processes (superficial and deep) occurring on margins, their origins, consequences, interactions and quantifications are only very partially described and understood. The identification of the relative role of factors is sometimes completely contradictory between authors. Here, we showed the results of a long-term multidecadal and multidisciplinary study (using geophysical, geological, stratigraphic, paleontological, geomorphologic, geochemical, microbiological and numerical models) in the Western Mediterranean Sea that acts as a natural laboratory at many different scales. We showed how sediments efficiently recorded at the same time: variations of glacio-eustatic sea-level changes, variations of sediments yield and sources, and also enabled quantifying vertical movements and geodynamic worldwide events but also detailed regional mass transport, turbidites and contourites deposits. They are also an archive of paleoclimatic, palaeoceanographic and diagenetic processes.

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Salt morphologies and crustal segmentation relationship: New insights from the Western Mediterranean Sea

Bellucci

Aslanian

Moulin

et al. 2021

Earth-Science Reviews

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Morphology of retrogressive failures in the Eastern Rhone interfluve during the last glacial maximum (Gulf of Lions, Western Mediterranean)

Cited by 16 publications

References 86 publications

Integrated geotechnical, sedimentological and geophysical investigation of seafloor instabilities in the Gulf of Lions Western Mediterranean

Integrated geotechnical, sedimentological and geophysical investigation of seafloor instabilities in the Gulf of Lions Western Mediterranean

Multidisciplinary Study of Marine Archives: Reconstruction of Sea-Level, Sediment Yields, Sediment Sources, Paleoclimate, Paleoceanography and Vertical Movement on Margins: Examples from the Western Mediterranean Sea

Salt morphologies and crustal segmentation relationship: New insights from the Western Mediterranean Sea

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