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| Pontee, Ni; Tastet, Jp; Masse, L. |
| The Medoc Peninsula is a triangular area of land between the Atlantic Ocean on the west and the Gironde estuary on the east. The Gironde, orientated SE-NW, is the largest estuary in France. On the Medoc Peninsula Holocene sediments cover a substratum of Tertiary limestones and Plio-Pleistocene fluvial terraces. The Gironde originated as an incised valley during the Weichselian glacio-eustatic fall (100 000-18 000 B.P.) and has acted as a sink for fine sediment throughout the Holocene sea level rise (SLR) (18 000 B.P. onwards). Conversely, the Atlantic littoral zone, characterised by sandy beaches and dunes, has been subjected to erosion throughout the Holocene transgression. The incised valley of the present Gironde was inundated by the sea approximately... |
| Tipo: Text |
Palavras-chave: Holocène; Changement côtier; Marais estuarien; Dune éolienne; Chenier; Holocene; Coastal change; Salt marsh; Aeolian dune; Chenier. |
| Ano: 1998 |
URL: http://archimer.ifremer.fr/doc/00326/43683/43191.pdf |
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| Clave, B; Masse, L; Carbonel, P; Tastet, Jp. |
| The La Perroche marsh is a small Holocene marsh on the south-western coast of the Oleron island (Bay of Biscay, France) presently occupied by a freshwater swamp and separated from the ocean by a continuous sand dune ridge. The study of its infill shows first basal conglomeratic deposits with calcareous pebbles on a Cenomanian rough substrate. The Holocene infill since 6000 years BP begins with a very fast sedimentation of sands. Then, the sedimentation becomes finer, with lagoonal to freshwater influences recorded by ostracods. The distribution of these deposits inside the marsh is asymmetric, with a thick sandy-gravely layer in the eastern part and a succession of sands, clays and organic layers in the western part. Communication with the sea is episodic,... |
| Tipo: Text |
Palavras-chave: Changements côtiers; Marais maritime; Holocène; Ostracodes; Sédiments; Coastal changes; Coastal salt marsh; Holocene; Ostracods; Sediments. |
| Ano: 2001 |
URL: http://archimer.ifremer.fr/doc/00322/43349/42877.pdf |
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| Solignac, Sandrine. |
| Devant le problème du réchauffement planétaire, il est indispensable d'approfondir notre compréhension des mécanismes et des rétroactions qui régulent le climat pour pouvoir prédire les conséquences de tels changements. L'étude des climats passés permet de mettre en évidence la façon dont les événements climatiques s'encharnent. En particulier, étudier des périodes plus chaudes que l'actuelle permet de mieux comprendre ce vers quoi nous semblons nous diriger. C'est dans cette.optique que de nombreuses recherches sont menées sur l'évolution du climat au cours de la présente période interglaciaire, 1'Holocène. Notamment, bon nombre de ces études portent sur le milieu océanique, celui-ci étant responsable d'une grande partie des transferts de chaleur à la... |
| Tipo: Text |
Palavras-chave: Atlantique Nord; Holocène; Circulation océamque; Masse d'eau; Dinokyste; Coccolithe; Distribution; Fonction de transfert. |
| Ano: 2008 |
URL: https://archimer.ifremer.fr/doc/00505/61697/65665.pdf |
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| Tekiroglu, Selin Eda; Ediger, Vedat; Yemenicioglu, Semal; Kapur, Selim; Akca, Erhan. |
| Holocene sediments taken from the south-eastern and western Black Sea have been investigated in relation to their geochemical, sedimentological and mineralogical characteristics. Their textures are characterized by their low amount of sand, upward-increasing silt and downward-increasing clay contents. While the terrigenous materials transported from Anatolian volcanic-based sources and European alluvial sediments form the shore deposits, the deep-sea sediments mainly consist of the marine biological production. The highest amount of organic carbon was deposited following the formation of anoxic conditions at the bottom until the beginning of the still continuing carbonate-rich coccolith (Emiliania huxleyi) deposition. The high metal concentrations are... |
| Tipo: Text |
Palavras-chave: Mer Noire; Holocène; Sapropel; Coccolithes; Black Sea; Holocene; Sapropel; Coccolith. |
| Ano: 2001 |
URL: http://archimer.ifremer.fr/doc/00323/43369/42841.pdf |
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| Fanget, Anne-sophie; Bassetti, Maria Angela; Berne, Serge; Arnaud, Mireille. |
| Since the Last Glacial Maximum, the Rhone River, which is the most important source of freshwater and sediment to the western Mediterranean Sea, migrated in a north-westward direction during the rapid Deglacial and Early Holocene sea-level rise. During the phase of global high sea-level (Middle and Late Holocene), an overall eastward migration of the Rhone outlet, under natural and/or human influence, is recorded through several sediment accumulations confined along the inner shelf in the form of deltaic lobes. These lobes that make up the whole Rhone subaqueous delta represent very expanded sedimentary archives of the Rhone Holocene history. In this paper, using three long piston cores retrieved from the most recent Bras de Fer (RHS-KS55) and Roustan... |
| Tipo: Text |
Palavras-chave: Ostracodes; Delta sous-marin; Paléoécologie; Holocène; Méditerranée occidentale; Ostracoda; Subaqueous delta; Palaeoecology; Holocene; Western Mediterranean.. |
| Ano: 2013 |
URL: http://archimer.ifremer.fr/doc/00217/32810/31253.pdf |
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