Holocene evolution of coastal dunes in western France: Regional reconstruction from archaeological and historical data

Gorczyńska, Aneta; Stéphan, Pierre; Pailler, Yvan; Nicolas, Clément; Penaud, Aurélie; David, Ophélie; Vidal, Muriel; Gall, Bernard Le

doi:10.1016/j.aeolia.2022.100851

Cited by 5 publications

(4 citation statements)

References 110 publications

(206 reference statements)

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“…in its inland section (core G‐C2 Figures 5 and 6). The development of the oldest basal peat occurred under the combined influence of the slowing down of the Holocene sea‐level rise (García‐Artola et al, 2018; Goslin et al, 2013, 2015) and the stabilisation of the first coastal barriers (Gorczyńska et al, 2023; Morzadec‐Kerfourn, 1974; Stéphan et al, 2015).…”

Section: Discussion and Interpretationsmentioning

confidence: 99%

“…The development of large transgressive dune complexes in Brittany, such as the Keremma complex (Figure 12), took place in post‐Neolithic times (Gorczyńska et al, 2023). Archaeological remains of the Iron Age and/or Medieval periods discovered in paleosols at the base of aeolian deposits confirm that the principal phase of dune formation post‐dated the construction of the Kernic monument (Giot & Marguerie, 1994).…”

Section: Discussion and Interpretationsmentioning

confidence: 99%

“…However, (calibrated Anno Domini) and 1600-1840 cal. A.D. from the dating of interbedded archaeological remains in sand dunes (Gorczyńska et al, 2023).…”

Section: Geomorphological Settingmentioning

confidence: 99%

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An interdisciplinary approach to Late/Final Neolithic coastal gallery graves in Brittany, Western France: The 3D structure, origin of stone material, and paleoenvironmental setting of the Kernic and Lerret monuments

et al. 2023

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This article presents an interdisciplinary study of two Late/Final Neolithic gallery graves (Kernic and Lerret) located on the orthwestern coast of Brittany (Western France). These monuments show striking similarities in terms of architectural style and geographical position. This paper aims to provide a better understanding of the construction strategy of these monuments by (i) determining the origin of the megalithic blocks using comparative petro‐structural analyses of blocks and surrounding rocks, (ii) reconstructing the coastal environment from sediment core analyses and (iii) defining the significance of these monuments in the territories from an intervisibility analysis. The study reveals marked differences between the two monuments studied. The Lerret gallery grave was erected close to a unique source of stone material on the margins of a marshland zone. In contrast, the Kernic monument, erected on the edge of an estuary, seems to have been built using a deliberate diversification of stone extraction sites. An intervisibility analysis shows a dense network of visual interconnections between a number of megalithic tombs present in the study area, where the two monuments occupy very distinct sites. The social implications of stone selection and the geographical location of Late/Final Neolithic funerary monuments are also discussed in an enlarged regional context.

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Section: Discussion and Interpretationsmentioning

confidence: 99%

Section: Discussion and Interpretationsmentioning

confidence: 99%

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An interdisciplinary approach to Late/Final Neolithic coastal gallery graves in Brittany, Western France: The 3D structure, origin of stone material, and paleoenvironmental setting of the Kernic and Lerret monuments

et al. 2023

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“…They are also found in many settings, both coastal and terrestrial (e.g., Bullard & Nash, 2000). As there are many Holocene fossil cliff‐top dunes stretching along the cliff edges all over the world (e.g., Costa et al., 2012, 2017; Germain et al., 2009; Gorczynska et al., 2022; Hasslet et al., 2000; Ho et al., 2016; Short, 1988), they were originally recognized as relict bedforms and their development was related to sea‐level fluctuations and possibly climate changes (Jennings, 1967). In many cases, the dunes which are now atop cliffs were originally formed as different types of coastal dunes (e.g., climbing dunes, parabolic dunes, and transgressive dunefields) fed by sand either from beach or land sources.…”

Section: Introductionmentioning

confidence: 99%

Airflow Dynamics and Aeolian Sand Transport Across a Beach‐Climbing Dune‐Clifftop Dune System

Dłużewski,

Rotnicka,

Hesp

et al. 2023

JGR Earth Surface

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This study presents an analysis of wind flow and sediment transport from the beach up a 50 m high, long (130 m), steep (mean slope 26°) climbing dune and across a 1.5 m high max, 85 m long and 17.5 m wide clifftop dune 30 km south of Dakhla in Morocco, NW Africa, during highly oblique incident wind conditions. Multiple 2D sonic and cup/vane anemometers and sand traps were utilized for measurements. Flow steering was significant on the upper climbing dune. Flow deceleration occurred near the dune toe, and topographic forcing of flow was considerable on the upper slopes of the climbing dune. Near‐surface flow steadiness (CVU1, CVU0.25) on the climbing dune straight slope segment was low and constant. The distance upslope over which the airflow reached a speed comparable to that on the beach increases as the incident wind speed increases. The greatest flow acceleration and speed‐up was observed at the cliff edge reaching 250% at 1 m height and 220% at 0.25 m height for the lowest incident wind speed class (4–5 m/s). The sand transport rate declined from the beach to the climbing dune toe and lower slope, but at the uppermost section of the climbing dune was 4 times higher than in the beach for the 7–8 m/s incident wind speed. Sand in aeolian transport was generally finer than surface sand, with the mean grain size increasing up the slope. A comparison of the sand transport data collected with sand transport models, and the effects of slope on Aeolian transport are also examined.

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Using 17 years of beach/dune profile monitoring to characterize morphological dynamics related to significant extreme water level events in North Brittany (France)

et al. 2023

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Holocene evolution of coastal dunes in western France: Regional reconstruction from archaeological and historical data

Cited by 5 publications

References 110 publications

An interdisciplinary approach to Late/Final Neolithic coastal gallery graves in Brittany, Western France: The 3D structure, origin of stone material, and paleoenvironmental setting of the Kernic and Lerret monuments

An interdisciplinary approach to Late/Final Neolithic coastal gallery graves in Brittany, Western France: The 3D structure, origin of stone material, and paleoenvironmental setting of the Kernic and Lerret monuments

Airflow Dynamics and Aeolian Sand Transport Across a Beach‐Climbing Dune‐Clifftop Dune System

Using 17 years of beach/dune profile monitoring to characterize morphological dynamics related to significant extreme water level events in North Brittany (France)

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