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Abstract: Seismic-refraction prospections was carried out to follow the extension of indurated layers, especially the fossiliferous layers LD2 and LD3. Acquisition of data was difficult because of large vertical and lateral variability in sedimentological and geometrical characteristics of deposits. However, the prospection allowed to find the approximate limits of indurated layers. [Copyright &y& Elsevier]

Abstract: The trenchs made in 1993 outcropped a section of 10.4 m of loess across the fossiliferous levels of the Saint-Vallier mammal locality. This section was regularly sampled on 16 horizons. Paleomagnetic analyses showed the magnetite as the main magnetic carrier in these sediments, although some contribution of the hematite (more in hardened loess than in soils) is also recorded. The primary component of magnetization is reverse in all samples. This reverse polarity is tentatively correlated with Chron C2r (1,95 et 2,58 Ma) based on the biostratigraphic age of the site. [Copyright &y& Elsevier]