Modifications of prehistoric flint artefacts by periglacial processes: Presentation of experiments performed in 'centre de géomorphologie du cnrs' of caen [Altérations des artefacts préhistoriques en silex par les processus périglaciaires: Présentation des expériences conduites au centre de géomorphologie du cnrs de caen]

摘要

The microwear analysis of palaeolithic flints found in periglacial context led us to postulate the impact of ground frost on flint artefacts. To verify this hypothesis and consider the forms of post-depositional processes, laboratory experiments have been organized between 2004 and 2007 in the "Centre de Géomorphologie" (CNRS) of Caen, where patterns including flint artefacts have been subjected to freezing-thawing cycles. First results show microscopic alterations of the surface of flints that have been buried in loam. This must be confirmed and specified by microwear analysis.