This cave has produced a series of Aurignacian and Gravettian levels. In each case, numerous artifact refits between different archaeological layers indicate that strong post-depositional disturbances took place, whose exact nature is as yet unexplored. The technological information provided by the refits points to marked differences in both the raw material selection and the blade production processes for the two technocomplexes, Aurignacian and Gravetttian, and these are enumerated and discussed. Other Upper Palaeolithic sites where artifact refits have been extensively studied are briefly considered, and certain refinements in blade technology introduced by the Magdalenians, both in the Paris basin and in Southwest Germany, are noted. -- AATA