Skip to Main content Skip to Navigation
Journal articles

LES SÉQUENCES ALLUVIOLOESSIQUES DU WÜRM MOYEN/SUPÉRIEUR DE QUINCIEUX ET DE LYON (RHÔNEALPES, FRANCE) : PREMIÈRES INTERPRÉTATIONS PALÉOENVIRONNEMENTALES ET CORRÉLATIONS

Abstract : In 2013 and 2015, two 8-m-thick loess sequences with palaeosols were excavated in the lower Saône River valley in two sites 20 km away. At Quincieux, the sequence developed on a low terrace of the Saône River shows a lower palaeosol complex with frost wedges, laminated silts including sparsed blocks from the Alps, a median palaeosol or brownish horizon, gray clayey loams with sandy beds, massive loess and a Holocene topsoil complex. At Lyon-Apollinaire, the sequence leaned on the southern relief surrounding the Vaise Plain shows a unique 6-m-thick palaeosol complex eroded at the top and overlaid by massive to laminated fine gray loamy sands cut off by modern constructions. Conversely to the little evidence of human presence in Quincieux, faunal remains have been found in all palaeosols. However, only the oldest palaeosol of Quincieux was partially excavated in 2014. Multi-indicator samplings have been performed to reconstruct the chronological, pedological and environmental contexts of human occupations. 14C ages obtained at the base of gray loams in both sites yield similar ages of 18 ka. OSL and 14C ages obtained in the median brownish horizon of Quincieux are coherent around 20 ka. Conversely, those of the lower palaeosol are more variable between 27 and 40 ka and remain to be discussed. Ages obtained at Lyon-Apollinaire are coherent and reveal that the base and the top of the palaeosol complex correlate with the lower palaeosol and median brownish horizon of Quincieux respectively. Local conditions – slope context away from the alluvial plain – could explain such a difference. The comparison of these two sequences, unique for the lower Saône River valley, with those of northern France is not straightforward.
Complete list of metadatas

Cited literature [61 references]  Display  Hide  Download

https://hal-inrap.archives-ouvertes.fr/hal-02485777
Contributor : Odile Franc <>
Submitted on : Monday, February 24, 2020 - 3:56:01 PM
Last modification on : Monday, October 19, 2020 - 11:40:08 AM
Long-term archiving on: : Monday, May 25, 2020 - 6:09:03 PM

File

Franc etal 2017_Quaternaire-28...
Publisher files allowed on an open archive

Identifiers

Citation

Jeanfrançois Pasty, Odile Franc, Olivier Moine, Alexander Fülling, Patrick Auguste, et al.. LES SÉQUENCES ALLUVIOLOESSIQUES DU WÜRM MOYEN/SUPÉRIEUR DE QUINCIEUX ET DE LYON (RHÔNEALPES, FRANCE) : PREMIÈRES INTERPRÉTATIONS PALÉOENVIRONNEMENTALES ET CORRÉLATIONS. Quaternaire. International Journal of the French Quaternary Association, Association française pour l'étude du Quaternaire, 2017, pp.423-453. ⟨10.4000/quaternaire.8453⟩. ⟨hal-02485777⟩

Share

Metrics

Record views

164

Files downloads

216