From 1989 to 1991, a rescue-dig took place at Poses, «Le Vivier- Le Clos-Saint-Quentin». The area studied
is situated on the flood-plain, which explains in this place important alluvial deposits, and consequently exceptionnal conservation of neolithic and chalcolithic seulement levels.
On four hectares, the excavation has induced the study of seven settlements and also secondary areas (particularly combustion structures of polynesian type and accumulation of blocks of sandstone). The two oldest settlements belong to the «post-rubané» cultures (Villeneuve-Saint-Germain, Cerny) and the five others to the chalcolithic cultures.
The most important resuit concerns, on one hand, the first neolithisation of the country and, on the other hand, the development of a chrono-cultural framework for the Late Neolithic - Early Bronze Age transition. The excavations have shown the existence of original late neolithic features (assemblages 3 and 4), have confirmed the large impact of Bell Beakers espansion in a late time in the Lower Valley of the Seine River and their evolution (assemblages 5 and 6), and finally have allowed to discover an unknown chalcolithic feature (assemblage 7).
This operation enables us also to approach the theme of the development of marginal lands in areas liable to flooding.
Les recherches récentes concernant l'habitat de l'Age du Bronze et de l'Age du Fer en Haute-Normandie ont montré une diversité des plans plus importante que ce qui était jusque-là supposé. Bien que les constructions sur plans quadrangulaires restent les plus nombreuses, les sites de Bouafles, Poses (Eure), Etaimpuis (Seine-Maritime) démontrent l'existence de bâtiments de plans circulaires et de plans quadrangulaires. Ces constructions circulaires se caractérisent par une nette diversité des formules architecturales quant à leur superficie, à la nature des supports, et aux systèmes d'entrées.
RÉSUME Lors de la construction du Lien Fixe Transmanche, un monument funéraire composé de trois fossés circulaires concentriques, dont le plus grand atteint 60 m de diamètre, et comprenant deux structures funéraires dans sa partie centrale, a été décapé dans sa totalité. Les comparaisons proposées tant pour les enclos que pour le mobilier céramique, et coroborrées par une datation C14, permettent de situer la fréquentation de ce monument funéraire pendant l'Âge du Bronze ancien.
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