L'archéologie subaquatique dans les lacs Alpins Français

Billaud, Yves; Marguet, André

doi:10.4000/books.alpara.1497

Cited by 10 publications

(6 citation statements)

References 2 publications

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“…1). These sites are essentially of Neolithic and Late Bronze Age (from 5500 BC to 850 BC), but evidence for settlements in the Antiquity (700 BC-AD 500), Gallo-Roman period and High Middle Age (AD 500-1000) exists (Billaud & Marguet 1997;Marguet 2002 Nicoud et al 1987), 2: back swamps and flood plains, 3: gravel-dominated alluvial plain, 4: silt-dominated alluvial plain, 5: river bed, 6: location of old drill-sites discussed in Bravard (1981). B.…”

Section: Holocene Geomorphological and Archaeological Settingsmentioning

confidence: 99%

Rhone River flood deposits in Lake Le Bourget: a proxy for Holocene environmental changes in the NW Alps, France

Chapron

Arnaud²,

Noël

et al. 2005

Boreas

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The Holocene evolution of Rhone River clastic sediment supply in Lake Le Bourget is documented by sub-bottom seismic profiling and multidisciplinary analysis of well-dated sediment cores. Six high-amplitude reflectors within the lacustrine drape can be correlated to periods of enhanced inter- and underflow deposition in sediment cores. Based on the synthesis of major environmental changes in the NW Alps and on the age-depth model covering the past 7500 years in Lake Le Bourget, periods of enhanced Rhone River flood events in the lake can be related to abrupt climate changes and/or to increasing land use since c. 2700 cal. yr BP. For example, significant land use under rather stable climate conditions during the Roman Empire may be responsible for large flood deposits in the northern part of Lake Le Bourget between AD 966 and 1093. However, during the Little Ice Age (LIA), well-documented major environmental changes in the catchment area essentially resulted from climate change and formed basin-wide major flood deposits in Lake Le Bourget. Up to five ‘LIA-like' Holocene cold periods developing enhanced Rhone River flooding activity in Lake Le Bourget are documented at c. 7200, 5200, 2800, 1600 and 200 cal. yr BP. These abrupt climate changes were associated in the NW Alps with Mont Blanc glacier advances, enhanced glaciofluvial regimes and high lake levels. Correlations with European lake level fluctuations and winter precipitation regimes inferred from glacier fluctuations in western Norway suggest that these five Holocene cooling events at 45°N were associated with enhanced westerlies, possibly resulting from a persistent negative mode of the North Atlantic Oscillation

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Section: Holocene Geomorphological and Archaeological Settingsmentioning

confidence: 99%

Rhone River flood deposits in Lake Le Bourget: a proxy for Holocene environmental changes in the NW Alps, France

Chapron

Arnaud²,

Noël

et al. 2005

Boreas

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“…Au total, 13 bâtiments sont attet és, quatre vases de t ockage concentrés dans un même set eur, à proximité de l'habitat du « Pré d' Ancy», et trois greniers situés près de bâtiments de « Charnage ». Au bord du lac, au site de « La Vorge Ouet », des aménagements sont également présents à cette phase, datés de 1435 avant notre ère (Billaud, Marguet, Magny, 2007 Un t andard de cont rut ion de bâtiment se met en place à cette période (Néré et al, 2010). On cont ruit toujours de la même façon, selon un schéma prédéi ni et pour des tailles de maisons quasiment semblables [ill. 7].…”

Section: Des Origines Aux Premières Traces D'occupation Du Bronze Moyunclassified

“…Sept autres diagnot ics suivis de trois fouilles seront réalisés après cette première découverte aux lieux-dits « Vérancy nord, rue de Charnage » en 2008 (Néré et al, 2009), « Véreître, route d'Hermance » en 2009 (Néré et al, 2010), et « Pré d' Ancy, rue de Charnage » en 2012-2013 (Néré et al, 2014). Dans le lac, plusieurs campagnes ont été ef et uées par le DRASSM (Département des recherches archéologiques subaquatiques et sous-marines) ai n de repérer et carat ériser les sites palai ttiques (Billaud, Marguet, Magny, 2007). Le plus riche des sept identii és sur la commune a été fouillé sur environ 120 m².…”

unclassified

L’agglomération protohistorique de Chens-sur-Léman. Un modèle d’habitat inédit

Cousseran-Néré¹,

Néré²

2015

archeopages

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Les campagnes de fouilles effectuées entre 2009 et 2012 à Chens-sur-Léman (Haute-Savoie) permettent de renouveler la connaissance de l’habitat à l’âge du Bronze. Entre 1500 et 800 avant notre ère, on voit se développer sans interruption des concentrations de maisons qui vont s’agglomérer de plus en plus. Les chemins et l’implantation du parcellaire, et, de manière générale, l’organisation du territoire va être de plus en plus marquée. La forme des maisons va évoluer jusqu’à se standardiser vers 1050 avant notre ère. À cette période de densification la plus forte de la population, l’habitat du plateau va déborder jusqu’au bord du lac qui va voir émerger de nombreux palafittes.

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“…yr BP) has been proven by archaeological and palaeobotanical studies (e.g. Magny, 1993;Menotti, 2004;Ruttkay et al, 2004;Billaud and Marguet, 2005;de Marinis et al, 2005;Pétrequin et al, 2005;Magny et al, 2009). The widely observed decline of lake dwellings in the Alpine region during the Late Neolithic has been related to a climatic deterioration towards wetter conditions, probably aggravated by socioeconomic changes (Magny, 2004;Menotti, 2009).…”

Section: Neolithic Lake Dwellings At Lake Mondseementioning

confidence: 99%

Late Neolithic Mondsee Culture in Austria: living on lakes and living with flood risk?

et al. 2013

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Neolithic and Bronze Age lake dwellings in the European Alps became recently protected under the UNESCO World Heritage. However, only little is known about the cultural history of the related pre-historic communities, their adaptation strategies to environmental changes and particularly about the almost synchronous decline of many of these settlements around the transition from the Late Neolithic to the Early Bronze Age. For example, there is an ongoing debate whether the abandonment of Late Neolithic lake dwellings at Lake Mondsee (Upper Austria) was caused by unfavourable climate conditions or a single catastrophic event. Within the varved sediments of Lake Mondsee, we investigated the occurrence of intercalated detrital layers from major floods and debris flows to unravel extreme surface runoff recurrence during the Neolithic settlement period. A combination of detailed sediment microfacies analysis and μXRF element scanning allows distinguishing debris flow and flood deposits. A total of 60 flood and 12 debris flow event layers was detected between 7000 and 4000 varve years (vyr) BP. Compared to the centennial- to millennial-scale average, a period of increased runoff event frequency can be identified between 5900 and 4450 vyr BP. Enhanced flood frequency is accompanied by predominantly siliciclastic sediment supply between ca. 5500 and 5000 vyr BP and enhanced dolomitic sediment supply between 4900 and 4500 vyr BP. A change in the location and the construction technique of the Neolithic lake dwellings at Lake Mondsee can be observed during the period of higher flood frequency. While lake dwellings of the first settlement period (ca. 5800–5250 cal. yr BP) were constructed directly on the wetlands, later constructions (ca. 5400–4700 cal. yr BP) were built on piles upon the water, possibly indicating an adaptation to either increased flood risk or a general increase of the lake level. However, our results also indicate that other than climatic factors (e.g. socio-economic changes) must have influenced the decline of the Mondsee Culture because flood activity generally decreased since 4450 vyr BP, but no new lake dwellings have been established thereafter

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L'archéologie subaquatique dans les lacs Alpins Français

Cited by 10 publications

References 2 publications

Rhone River flood deposits in Lake Le Bourget: a proxy for Holocene environmental changes in the NW Alps, France

Rhone River flood deposits in Lake Le Bourget: a proxy for Holocene environmental changes in the NW Alps, France

L’agglomération protohistorique de Chens-sur-Léman. Un modèle d’habitat inédit

Late Neolithic Mondsee Culture in Austria: living on lakes and living with flood risk?

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