Features caused by ground ice growth and decay in Late Pleistocene fluvial deposits, Paris Basin, France

Bertrán, Pascal; Andrieux, Eric; Bateman, Mark D.; Font, Marianne; Manchuel, Kévin; Sicilia, D.

doi:10.1016/j.geomorph.2018.03.011

Cited by 13 publications

(21 citation statements)

References 70 publications

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“…However, it should be mentioned that pseudomorphs have been described in the Last Glacial floodplains in the Paris Basin (e.g. Bertran et al, 2018), i.e. in places that are favourable to snow accumulation a priori.…”

Section: Summary and Discussionmentioning

confidence: 99%

A new perspective on permafrost boundaries in France during the Last Glacial Maximum

et al. 2021

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Abstract. During the Last Glacial Maximum (LGM), a very cold and dry period around 26.5–19 kyr BP, permafrost was widespread across Europe. In this work, we explore the possible benefit of using regional climate model data to improve the permafrost representation in France, decipher how the atmospheric circulation affects the permafrost boundaries in the models, and test the role of ground thermal contraction cracking in wedge development during the LGM. With these aims, criteria for possible thermal contraction cracking of the ground are applied to climate model data for the first time. Our results show that the permafrost extent and ground cracking regions deviate from proxy evidence when the simulated large-scale circulation in both global and regional climate models favours prevailing westerly winds. A colder and, with regard to proxy data, more realistic version of the LGM climate is achieved given more frequent easterly winds conditions. Given the appropriate forcing, an added value of the regional climate model simulation can be achieved in representing permafrost and ground thermal contraction cracking. Furthermore, the model data provide evidence that thermal contraction cracking occurred in Europe during the LGM in a wide latitudinal band south of the probable permafrost border, in agreement with field data analysis. This enables the reconsideration of the role of sand-wedge casts to identify past permafrost regions.

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Section: Summary and Discussionmentioning

confidence: 99%

A new perspective on permafrost boundaries in France during the Last Glacial Maximum

et al. 2021

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“…These features were first described by Baize et al, in 2007 following the observations of M. Coulon in 1994. With 'Features caused by ground ice growth and decay in late Pleistocene fluvial deposits, Paris basin, France', the paper of Bertran et al, (2018) reappraises our data at the light of a section in a new quarry. The data presented in this second paper were mostly gathered and provided by a chemist, P. Benoït, in quarries at Sauvage (Aube River), Marcilly (Seine River), and also Gourgançon (Maurienne River) (Fig.…”

Section: Introductionmentioning

confidence: 91%

Evidence of multiple thermokarst events in northeastern France and southern Belgium during the two last glaciations. A discussion on ‘Features caused by ground ice growth and decay in Late Pleistocene fluvial deposits, Paris basin, France’ ( )

et al. 2019

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“…Upward bending of the strata is exceptional as it was superseded later on by the effects of subsidence 13 . Such a succession with compressional structures, such as micro‐folds, and the later development of pressure‐releasing features during ice‐wedge melting, such as slump structures and normal faults, is similar to the structures caused by the successive growth and decay of lenses of ground ice 41 . These structures pre‐dated Svecofennian deformation and metamorphism.…”

Section: Ice‐wedge Pseudomorph and Associated Deformations In The Stumentioning

confidence: 98%

Evidence of permafrost in the Paleoproterozoic (c. 1.9 Ga) of Central Sweden

Vandenberghe

Kuipers²,

Beunk

et al. 2020

Permafrost & Periglacial

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This paper reports on an ice‐wedge pseudomorph that formed and is preserved in metavolcanic host material that was later transformed to metamorphic solid bedrock. It has been dated to 1,895 ± 5 Ma by U–Pb geochronology of zircon in the bedrock, an Early Proterozoic age. Detailed observation of the deformation structures of the wedge points to an ice‐wedge pseudomorph based on typical downbending around the wedge and vertical lamination in the inner part of the wedge due to slumping into the wedge after the ice melted, along with a few remains of lateral pressure structures (such as folds and upturned strata) in the adjacent host sediment. The interpretation of the wedge structure as an ice‐wedge pseudomorph confirms previous work on this topic. This ice‐wedge pseudomorph demonstrates for the first time the existence of permafrost at c. 1.9 Ga. It indicates that permafrost and associated conditions were present in lowlands at low latitude at discrete time intervals early in Earth’s history. Although some caution should be applied, mean annual air temperature appears to have been slightly below the freezing point at that time.

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Features caused by ground ice growth and decay in Late Pleistocene fluvial deposits, Paris Basin, France

Cited by 13 publications

References 70 publications

A new perspective on permafrost boundaries in France during the Last Glacial Maximum

A new perspective on permafrost boundaries in France during the Last Glacial Maximum

Evidence of multiple thermokarst events in northeastern France and southern Belgium during the two last glaciations. A discussion on ‘Features caused by ground ice growth and decay in Late Pleistocene fluvial deposits, Paris basin, France’ ( )

Evidence of permafrost in the Paleoproterozoic (c. 1.9 Ga) of Central Sweden

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