The major part of the deposits of the current floodplain of the Vézère is most probably Holocene in age, with the majority of the Pleistocene deposits having been eroded away or have been buried below thick layers from more recent times. Anyhow, at several locations Pleistocene sediments are still present below Holocene overbank deposits.
A limited sondage at the foot of Laugerie-Haute showed that Pleistocene deposits can still be found below the Holocene strata. Most of the stone artefacts recorded during these sondage were made out of dark gray to black flint, generally locally collected as judged from the rolled cortex of the raw material. Small numbers of artefacts were made out of Bergerac flint, jasper, chalcedoine and hyaline quartz.
As far as the Senonian flints are concerned, the grey and black group clearly displayed better flaking properties than the beige one, independent of morphology and dimensions of the nodules. This may explain the large quantity of exactly this raw material, that has been processed during the Upper Paleolithic at many key sites in the Vézère, for example at the La Madeleine rock shelter (Magdalenian), at La Rochette (especially during the Aurignacian) or at Pataud during the Aurignacian and Gravettian although, the excellent Flint from the Bergerac region becomes more important at Pataud during the Gravettian.
a nice overview of the raw materials, used during the Solutrean at Laugerie can be found here: