Datations AMS du radiocarbone des ciments carbonatés des conglomérats alluviaux fini-pléistocènes de la rivière Verdouble.
Implications paléoenvironnementales relatives au site paléolithique de Tautavel (Pyrénées-Orientales) The Pleistocene alluvial conglomerates of the Verdouble River valley, close to the famous Palaeolithic site of Tautavel, were the object of lithologic determinations including microtextural analysis intended to define their provenance, their sedimentary facies and their calcite cement.
Lateral erosion by floods of the Verdouble probably destroyed the Palaeolithic soils and settlements downstream of the Gouleyrous Gorges: the limited preserved evidence is exactly situated upstream at the confluence of the Vingrau Stream and Verdouble River.
Les conglomérats alluviaux pléistocènes de la vallée du Verdouble, proches du célèbre site paléolithique de Tautavel, ont fait l’objet de déterminations lithologiques des galets afin de déterminer leur provenance et d’analyses microstructurales des ciments calcitiques préliminaires aux datations AMS du C.
The location and nature of clastic sediment and the dating of its cements may provide constraints on the timing of calcrete formation and of aggradation and incision of the alluvial deposits.
These accumulations and their cements involve a combination of a rather warm and wet environment.
Facing southward and shielded from prevailing wind, this site is also situated near the water source of the Verdouble, a necessity for both man and animal. In the upstream of Gouleyrous Gorge (Paziols plain) according to the geologic map of Rivesalte (Berger et al., 1997).
upstream and downstream of the Gouleyrous Gorge, which crosses the Devèze upland. L: Lias, J: Jurassic, C: Cretaceous, Ci: Lower Cretaceous; g2-3: Oligocene conglomerates.Therefore, various examples of the Th dating of carbonate cements were provided through conglomerates of the proglacial valley fills of Austria (Ostermann et al., 2006), the alluvium terraces in New York State (Seleck and Baran, 2003), pedogenic layers (Rubin and Sieh, 1997; Vincent et al., 2007), calcretes in the soils (Geyh and Eitel, 1998; Srivastava, 2001), tufaceous carbonates (Haynes et al The Verdouble River is the main tributary of the Agly River, which it joins on his left bank downstream to Estagel (fig. It flows through a subalpine valley located in the Corbières hilly area.The bedrock is Silurian and Devonian in the north of the catchment, Jurassic for uplands bounding the catchment in the south and finally Jurassic and Cretaceous for the downstream course of the Verdouble and the Vingrau-Tautavel plain.Previous age assignments by other authors envisage that these conglomerates belong to the MIS 7 (Mindel-Riss interglacial).For the first time, single-phase and some polyphase cements were AMS 48,000 years BP.The precipitation of calcium carbonate cement from soil water and shallow ground water provides a potential record of environmental conditions.