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Standing stones of Le Gavre forest (Loire-Atlantique, France): nature and origin of materials, preliminary dating results (C14, OSL)

Abstract : Stone rows are a major component of the study of late Prehistoric megaliths. The western phenomenon which lasted for about three millennia is no yet well defined due to the lack of sufficient studies on this architectural object. In western France, the rows of menhirs in quartzitic rock constitute a not well known but overall original subset. Assessing their chronology is therefore a priority. In this context, the unpublished megalith site of the Pilier in the northern area of the forest of Le Gavre (north of Nantes, France) was selected. Three limited excavations allowed recording the archaeological layers in contact with three monoliths. As an experimental test, a direct OSL dating was considered, but the grains of quartz coming from two blocks and from a shim stone, were very dim making them unsuitable for dating purposes. An alternative was nevertheless offered by dating the sediments filling the pit of the monolith N15. The OSL date range: [12040-1680] BC (1 sigma) places the digging of the pit and therefore the erection of the side in the early Bronze Age. This chronological interval is in agreement with the C-14 date obtained from a charcoal from the pit foundation of a second stone N6A [1752-1628] BC (2 sigma).
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https://hal-univ-rennes1.archives-ouvertes.fr/hal-01147549
Contributor : Laurent Jonchère <>
Submitted on : Thursday, April 30, 2015 - 3:54:34 PM
Last modification on : Tuesday, September 1, 2020 - 9:40:05 AM

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  • HAL Id : hal-01147549, version 1

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Serge Cassen, Sophie Blain, Pierre Guibert, Guirec Querré, Cyrille Chaigneau. Standing stones of Le Gavre forest (Loire-Atlantique, France): nature and origin of materials, preliminary dating results (C14, OSL). Archeosciences, revue d'Archéométrie, G.M.P.C.A./Presses universitaires de Rennes, 2013, pp.173-188. ⟨hal-01147549⟩

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