Do soft sediment deformations in the Late Triassic and Early Jurassic of the UK record seismic activity during the break-up of Pangea?

Laborde-Casadaban, Marine; Homberg, Catherine; Schnyder, Johann; Borderie, Sandra; Raine, Robert J.

doi:10.1016/j.pgeola.2021.02.007

Cited by 9 publications

(10 citation statements)

References 54 publications

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“…Although this cracked surface is unique within a 6 m succession of similar facies, it seems probable that the mud-cracked surface and at least one of the underlying deformed intervals may stem from the same seismic event. Correlation of these surfaces within the UK (Mayall, 1983;Simms, 2007;Laborde-Casadaban, 2021), and a similar synaeresiscracked surface in the Schandelah-1 core of the Germanic Basin (Lindström et al, 2015(Lindström et al, , 2017, is indicated by their position immediately below the start of the CIE (Fig. 3).…”

Section: Seismic Eventsmentioning

confidence: 99%

“…The intense soft sediment deformation in the lower Cotham Member at Waterloo Bay and Cloghan Point was initially ascribed to the effects of a single large magnitude seismic event (Simms, 2003(Simms, , 2007, but similar deformation in the upper Westbury Formation testifies to several episodes of pre-Cotham Member seismic activity (Fig. 10) (see also Laborde-Casadaban et al, 2021;Lindström et al, 2015). Seismic shock need not be the only cause of soft-sediment deformation and it should be acknowledged that the typical Cotham Member mudstone-siltstone facies (Fig.…”

Section: Seismic Eventsmentioning

confidence: 99%

“…9a). The overlying Cotham Member contains a strongly deformed horizon, which exhibits intermittent recumbent folding where alternations of silt and clay make it visible, but deformation occurs within the more argillaceous intervals also (Laborde-Casadaban et al, 2021). Supposed tsunami -up towards the top of the most intensely deformed beds at Larne (Simms 2003(Simms , 2007 probably represent -of more-cohesive sediment that failed to liquefy under the lower pore pressures at the top of the seismite.…”

Section: Seismic Eventsmentioning

confidence: 99%

“…The soft sediment deformation seen in the Larne Basin is ascribed to seismic activity during the TJB interval (Simms, 2003(Simms, , 2007Laborde-Casadaban et al, 2021). Widespread soft-sediment deformation through the TJB interval in north-west Europe has in the past been ascribed to seismicity associated with rifting of the proto-Atlantic (Swift, 1999;Hesselbo et.…”

Section: Seismic Activitymentioning

confidence: 99%

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Carbon isotopes, ammonites and earthquakes: Key Triassic-Jurassic boundary events in the coastal sections of south-east County Antrim, Northern Ireland, UK

Jeram

Simms

Hesselbo

et al. 2021

Proceedings of the Geologists' Association

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Section: Seismic Eventsmentioning

confidence: 99%

Section: Seismic Eventsmentioning

confidence: 99%

Section: Seismic Eventsmentioning

confidence: 99%

Section: Seismic Activitymentioning

confidence: 99%

See 2 more Smart Citations

Carbon isotopes, ammonites and earthquakes: Key Triassic-Jurassic boundary events in the coastal sections of south-east County Antrim, Northern Ireland, UK

Jeram

Simms

Hesselbo

et al. 2021

Proceedings of the Geologists' Association

Self Cite

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“…org/10.6084/m9.figshare.14604567). Another possible process could involve the shallow liquefaction of uncompacted muddy sediment to form mud volcanoes, perhaps seismically induced in these Late Triassic environments (Mayall, 1983;Simms, 2003Simms, , 2007Laborde-Casadaban et al 2021). Both alternatives might result in a random distribution of rimmed pits or lead to some alignment of structures relating to the deformational setting.…”

Section: Descriptionmentioning

confidence: 99%

Late Triassic dinosaur tracks from Penarth, south Wales

et al. 2021

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Evidence of Late Triassic large tetrapods from the UK is rare. Here, we describe a track-bearing surface located on the shoreline near Penarth, south Wales, United Kingdom. The total exposed surface is c. 50 m long and c. 2 m wide, and is split into northern and southern sections by a small fault. We interpret these impressions as tracks, rather than abiogenic sedimentary structures, because of the possession of marked displacement rims and their relationship to each other with regularly spaced impressions forming putative trackways. The impressions are large (up to c. 50 cm in length), but poorly preserved, and retain little information about track-maker anatomy. We discuss alternative, plausible, abiotic mechanisms that might have been responsible for the formation of these features, but reject them in favour of these impressions being tetrapod tracks. We propose that the site is an additional occurrence of the ichnotaxon Eosauropus, representing a sauropodomorph trackmaker, thereby adding a useful new datum to their sparse Late Triassic record in the UK. We also used historical photogrammetry to digitally map the extent of site erosion during 2009–2020. More than 1 m of the surface exposure has been lost over this 11-year period, and the few tracks present in both models show significant smoothing, breakage and loss of detail. These tracks are an important datapoint for Late Triassic palaeontology in the UK, even if they cannot be confidently assigned to a specific trackmaker. The documented loss of the bedding surface highlights the transient and vulnerable nature of our fossil resources, particularly in coastal settings, and the need to gather data as quickly and effectively as possible.

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Marine redox change and extinction in Triassic–Jurassic boundary strata from the Larne Basin, Northern Ireland

Bond

Dickson

Ruhl

et al. 2022

Palaeogeography, Palaeoclimatology, Palaeoecology

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Do soft sediment deformations in the Late Triassic and Early Jurassic of the UK record seismic activity during the break-up of Pangea?

Cited by 9 publications

References 54 publications

Carbon isotopes, ammonites and earthquakes: Key Triassic-Jurassic boundary events in the coastal sections of south-east County Antrim, Northern Ireland, UK

Carbon isotopes, ammonites and earthquakes: Key Triassic-Jurassic boundary events in the coastal sections of south-east County Antrim, Northern Ireland, UK

Late Triassic dinosaur tracks from Penarth, south Wales

Marine redox change and extinction in Triassic–Jurassic boundary strata from the Larne Basin, Northern Ireland

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