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Publications (154)
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 str...
New findings acquired in Armorican shelf (core MD08-3204 CQ: Bay of Quiberon and core VK03-58bis: South Glénan islands) depict Holocene paleoenvironmental changes since 10 ka BP through a multi-proxy dataset including sedimentological and palynological data. First, grain-size analyses and AMS-¹⁴C dates show a common sedimentary history for both stu...
L’objectif de cette étude est de mieux cerner les conséquences des variations relatives du niveau marin sur la transformation des paysages littoraux et leurs implications sur les sociétés humaines, en nous intéressant aux Pays de la Loire. Une première estimation de la remontée du niveau marin relatif est proposée sur les deux derniers millénaires...
In the aftermath of the last ice age, when sea level rose along most of the world's coastline, the activities of coastal peoples were impacted by coastal submergence, land loss and sometimes isolation as offshore islands formed. In some parts of the world, there is clear evidence that people encoded their observations of postglacial sea-level rise...
The morphodynamic functioning of the Sillon de Talbert gravel barrier spit is analyzed using a high‐frequency survey carried out between September 2012 and December 2019. It is based on beach profile measurements along two transects, modeling offshore wave data (WW3), tide gauge records, and shallow waves and water levels recorded in the intertidal...
In preliterate contexts, diverse knowledge was accumulated, processed and communicated orally. Recent research demonstrates that observations of memorable events were transferred in this way for thousands of years sometimes. Much of this information was eventually written down to reach literate audiences, which commonly judge such ‘myths and legend...
While early maps are known from all over the world, the key questions always involve: what exactly do they show? And what spatial extent do they cover? In this context, we recently used 3D‐modelling to re‐examine a carved stone slab datable to the Early Bronze Age (c.2150–1600 BC) that was found at Saint‐Bélec in Brittany. We show that the surface...
Rozwój i ewolucja wydm nadmorskich jest kontrolowana przez wiele czynników, takich jak bilans materiału osadowego, zmiany względnego poziomu morza, siła i kierunek wiatrów, czy stabilność szaty roślinnej. Na podstawie badań stratygraficznych, geomorfologicznych i chronologicznych przeprowadzonych wzdłuż atlantyckich wybrzeży Europy podkreślono zwią...
Primarily monitored for its biodiversity and the ecosystem services it provides, the coastal environment is also the focus of major issues for the protection of cultural heritage. From the beginning of the Holocene marine transgression to the present day, these rich but fragile territories have been subject to continuous and extreme events, facing...
The Gironde estuary in SW France is the largest in Western Europe and has attracted human populations since prehistoric times. From the 1970s to the 1990s, intense archaeological research was undertaken on the long and highly dynamic coastline just south of the estuary mouth. In recent years, the combined action of increased coastal erosion and hum...
We discuss paleoenvironments of north-western France over the last 7 kyrs in terms of: i) long-term changes (relative sea-level rise and boreal summer insolation), ii) rapid climate changes (millennial-scale Bond events and multi-decadal regimes of the North Atlantic Oscillation: NAO) and iii) growing human impacts in watersheds. Our study focuses...
In the original article, there was a mistake in the legend for Figure 1 as published. After publication, it was brought to the authors’ attention that DEIMS-SDR also included not-LTER sites (Wohner et al., 2019) and the so called LTER “parent sites,” at the same hierarchical level of the research sites they are made of, generating some duplicates....
This paper aims to analyze the shoreline changes of coastal accumulations (sandy and gravel beaches/barriers) of Brittany (Western France). Three long, medium, and short term spatio-temporal scale observations are taken into consideration for the assessment of shoreline dynamics at this regional scale. Firstly, the long-term shoreline position evol...
Due to the richness of its coastal environments, particularly lagoons and mangrove, the low-lying areas of the Omani coastline attracted settlements very early. However, the low-lying coasts are highly mobile landscapes, whose evolution is controlled by multiple factors acting at different timescales, from episodic (extreme events) to millennial ti...
On the seashore, archaeologi’cal remains appear well preserved and sometimes immediatly visible during erosion periods. But the constraints are accumulating at all levels : limited intervention time, water, movement of tides, rapid change due to erosion, access conditions to excavations, difficulty encountered in implementation of heavy infrastruct...
This paper provides a synthesis of current knowledge concerning the morphological and landscape evolutions of the French Atlantic and English Channel coasts of France during the Pleistocene and Holocene periods. These changes are compared with archaeological data in order to better understand the distribution of human settlements and the environmen...
Understanding the threats to global biodiversity and ecosystem services posed by human impacts on coastal and marine environments requires the establishment and maintenance of ecological observatories that integrate the biological, physical, geological, and biogeochemical aspects of ecosystems. This is crucial to provide scientists and stakeholders...
A coastal geoarchaeology analysis of the Aquitaine palaeoenvironments
In the North Médoc (Gironde department), between the communes of Soulac-sur-Mer and Montalivet-les-Bains, the sandy shoreline has been exposed to a very strong erosion. Dealing with a rich archaeological, historical and environmental heritage, an interdisciplinary team has been constituted, consisting of archaeologists, geomorphologists and biologi...
The adaptation of territorial systems to the ongoing climate change is an issue which implies to test past populations abilities to cope, to “bounce back” or to adapt during similar past environmental changes. The chronostratigraphical and archaeological results, obtained in the frame of the LITAQ project, make it possible to better understand chan...
Located at the mouth of the Gironde estuary (southwestern Atlantic coast of France), the Amélie beach recorded a huge coastal erosion during the recent stormy events, especially in the winter 2013-2014. The dune scarping and the sediment depletion on the beach uncovered a set of estuarine and aeolian sediment deposits containing numerous archaeolog...
Pleistocene deposits exposed along the coast of the Médoc area, south‑west France, represent valuable palaeoenvironmental archives that have been the subject of extensive work in the past few decades. To further understand the palaeoenvironmental history and sedimentary dynamics of these deposits, a detailed lithostratigraphic study was performed o...
To be efficient, fisheries need to be built in the intertidal range. Thus, the evolution of their geographical position in time highlights modifications of the coastlines, generally closely related to environmental changes. Along the island of Yeu (Mid-French Atlantic coast), dozens of fisheries were identified. Currently totally submerged, most of...
Sedimentological, palynological, and micropalaeontological studies carried out throughout the first half of the Holocene, during the Mesolithic/Neolithic transition in the Bay of Brest (i.e. 9200–9000 and 6600–5300 cal. BP) and in the Bay of Douarnenez (i.e. 9200–8400 cal. BP), allowed characterizing coastal environmental changes under the increasi...
suivi morphosédimentaire du sillon de Talbert pour l'année 2018, commune de Pleubian (22)
The Sillon de Talbert is situated on the Northern coast of Brittany; it is a large 3.5 km-long swash-aligned gravel spit barrier comprising a volume of sediment of 1.23x10 ⁶ m 3. Since 2002 a morphodynamic survey was carried out. It is based on annual DEMs and monthly beach proile measurements. Waves and water levels are also surveyed using modelli...
High-quality relative sea-level (RSL) data reveal spatial and temporal variations in crustal movements during the Holocene, which are used for many applications, ranging from calibrating models of earth rheology and ice sheet reconstructions to the development of coastal lowlands and human occupation. Here, we present a Holocene RSL database for th...
While recent studies highlighted the great mobility of boulder beaches related to the impact of storm waves, numerous researches are still needed to better understand the morphodynamic of coastal boulder accumulations. This paper provides original data about storm-induced geomorphic processes and their impact on the Valahnúkur coastal barrier. Firs...
This paper reviews the reconstruction of European Atlantic storm events with the contribution of a new stormy reconstruction in its central part. Three marsh environments on the island of Yeu were chosen to identify disturbing storm events from the Mid- to Late Holocene with vibracore sampling, radiocarbon dating and sedimentary analysis. Nine prob...
The Sillon de Talbert is a large swash-aligned gravel barrier spit of 3.5 km length, situated on the Northern coast of Brittany. Over the last decades, the spit experienced landward migration by rollover reaching 1.1 m yr⁻¹ at least since 1930, with maximum retreat rates of 1.35 m yr⁻¹ affecting the proximal section. This evolution has led to the c...
he link between the shoreline changes and the variation of the meteo‑oceanic forcing of the Goulven Bay (north Brittany, France) is analyzed over a period of 70 years (1948‑2016). his analysis is based on a study of 7 km of shoreline changes by photo‑interpretation digital processing of 19 campaigns of aerial photographs (60 photos) and a DGPS ield...
Phenotypic variation was characterized in 187 modern and archaeological specimens of the lesser white-toothed shrew (Crocidura suaveolens), obtained from both insular and continental European locations. Geometric morphometric methods were used to quantify variation in size and shape of the mandible. The phenotypic distance between populations, and...
The Beg-er-Vil coastal site (Quiberon, Morbihan, France), initially excavated in the 1980s, and more extensively since 2012, is exposed to strong marine and anthropic erosion. At the present time, the main challenge is to define the status of the site by describing its formation dynamics. This necessitates investigating the taphonomic and erosive m...
Les sociétés du Néolithique installées en Bretagne ont érigé de nombreux monuments mégalithiques en bord de mer. Aujourd'hui, plusieurs de ces vestiges, ensevelis sous les dunes ou submergés par la mer, sont des témoins spectaculaires des changements de l'environnement côtier qui s'y sont déroulées durant tout l’Holocène. Afin d'apporter un éclaira...
This reports on a project that combined evidence gleaned from aerial photographs, place-names, interviews, topography, LIDAR data, and sonar bathymetry to locate stone tidal fish weirs in the Molène Archipelago. The results were verified by diver and pedestrian visual surveys. Models of Holocene sea-level change allowed a group of possibly Late Mes...
During the winter 2013-2014, severe storm events caused a coastal erosion in the southern part of the Beniguet Island (Brittany, France). The associated shoreline retreat had uncovered three layers of shell middens interbedded into an aeolian sand dune deposit. From several radiocarbon dating crossed with the study of ceramic and lithic contents, t...
The chronology of the late-Holocene coastal storms was reconstructed from vibracore samplings, radiocarbon dating and sedimentary analysis from Yeu island (French Atlantic coast). The methodology used is based on the identification of disturbing sedimentary events recognized within three Holocene sedimentary transgressive sequences selected along t...
Les sociétés du Néolithique et de l’âge du Bronze ancien installées en Bretagne ont érigé de nombreux monuments mégalithiques (tombes, pierres dressées) en bord de mer. Aujourd’hui plusieurs de ces vestiges, ensevelis sous les dunes ou submergés par la mer, sont des témoins spectaculaires des changements de l'environnement côtier (transgression mar...
Les sociétés du Néolithique et de l’Age du Bronze ancien installées en Bretagne ont érigé de nombreux monuments mégalithiques en bord de la mer. Aujourd’hui, plusieurs de ces vestiges, ensevelis sous les dunes ou submergés par la mer, sont des témoins spectaculaires de changements de l’environnement côtier et des activités humaines qui s’y sont dér...
Les sociétés du Néolithique et de l’âge du Bronze ancien installées en Bretagne ont érigé de nombreux monuments mégalithiques (tombes, pierres dressées) en bord de mer. Aujourd’hui plusieurs de ces vestiges, ensevelis sous les dunes ou submergés par la mer, sont des témoins spectaculaires des changements de l'environnement côtier (transgression mar...
The Sillon de Talbert is a 3.2 kilometer trailing-type pebble spit located on the northern coast of the Brittany peninsula in France. It is composed of four distinct sedimentary units and is formed of sediments which granulometry ranges from sand grain to pebble. This study focuses on the internal architecture of the distal part of the spit. A near...
Les sociétés néolithiques et de l’âge du Bronze ancien installées en Bretagne ont érigé de nombreux monuments mégalithiques (tombes, pierres dressées) en bord de mer. Aujourd’hui plusieurs d’entre eux, ensevelis sous les dunes ou submergés par la mer, sont des témoins spectaculaires de l’évolution du littoral qui s’est opéré durant ces derniers mil...
The Mesolithic site of Beg-er-Vil is a well-preserved level, visible at the top of a cliff of the Quiberon Peninsula (Morbihan). Firstly excavated by O. Kayser during 1980s, the site is the object since 2012 of an extensive excavation, to anticipate its likely destruction by the erosion. A study of the available aerial pictures (from 1932 to our da...
Cet article dresse l'inventaire des barrages de pêcheries de l’archipel de Molène (mer d’Iroise, Finistère). Cet inventaire s'appuie sur (i) les vues aériennes, les sources orales, la toponymie, des prospections pédestres est sous-marines, ainsi que des levés bathymétriques. Les différents barrages repérés sont décrits d'un point de vue de leur arc...
