La vallée d'Ys : un paléoréseau hydrographique immergé en baie de Douarnenez (Finistère,France) |
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| Authors: | Gwénaël Jouet Claude Augris Bernard Hallegouët Pascal Le Roy Joël Rolet |
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| Institution: | 1. Institut universitaire européen de la Mer, UMR 6538 « Domaines océaniques », place Nicolas-Copernic, 29280 Plouzané, France;2. Ifremer, « Géosciences marines », technopôle Brest-Iroise, BP 70, 29280 Plouzané, France;3. Université de Bretagne occidentale, département de géographie, BP 817, 29285 Brest cedex, France |
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| Abstract: | Interpretation of the recent high-resolution survey, CANADOU 2000, in the Bay of Douarnenez (Finistère, France) allowed us to restore the morphology of the substratum and the sedimentary filling of the bay. The Brioverian and Palaeozoic substratum reveals a well-defined network of incised valleys as results of successive emergence stages of the Bay during the Quaternary. Valleys join in a westward-widened mean valley, called Ys Valley. The present-day sedimentary fill of the bay of Douarnenez appears mainly controlled by the Holocene rise and the consecutive highstand. It comprises fluvial and estuarine deposits filling up incised valleys and marine sedimentation extending out of the incised valleys. To cite this article: G. Jouet et al., C. R. Geoscience 335 (2003).To cite this article: G. Jouet et al., C. R. Geoscience 335 (2003). |
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| Keywords: | baie de Douarnenez sismique Bretagne paléovallées paléorivages remplissages sédimentaires eustatisme Quaternaire France Bay of Douarnenez seismic Brittany incised valley palaeoshoreline sedimentary filling eustasy Quaternary France |
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