A geometric index of reduction for unifacial stone tools

Abstract Issues relating to the maintenance and renewal of stone tools have become increasingly important in studies of prehistoric technologies. This paper presents an index of reduction for unifacial side-scrapers, a common tool form in many assemblages. The index is based on a simple geometric model of flake cross-sections. It is unprejudiced by varying paths of reduction and the original sizes of tools. However, the index is potentially subject to bias resulting from variation in the form of tool blanks: In spite of these constraints, experimental data suggest that the index constitutes' a reliable measure of the extent of tool reduction.

[1]  H. Dibble,et al.  New experimental evidence on the relation between percussion flaking and flake variation , 1981 .

[2]  John D Speth,et al.  Experimental investigation of hard-hammer percussion flaking , 1974 .

[3]  Robert L. Kelly,et al.  The Three Sides of a Biface , 1988, American Antiquity.

[4]  R. Gould.  Chipping stones in the Outback , 1968 .

[5]  Harold L. Dibble,et al.  A Comparative Study of Basic Edge Angle Measurement Techniques , 1980, American Antiquity.

[6]  Harold L. Dibble,et al.  Reduction Sequences in the Manufacture of Mousterian Implements of France , 1987 .

[7]  J. P. Gallagher.  Contemporary Stone Tools in Ethiopia: Implications for Archaeology , 1977 .

[8]  H. Dibble.  The Interpretation of Middle Paleolithic Scraper Morphology , 1987, American Antiquity.

[9]  Douglas B. Bamforth,et al.  Technological Efficiency and Tool Curation , 1986, American Antiquity.

[10]  A. Tavoso.  Réflexions sur l'économie des matières premières au Moustérien , 1984 .

[11]  Michael J. Shott,et al.  On Tool-Class Use Lives and the Formation of Archaeological Assemblages , 1989, American Antiquity.

[12]  J. Speth.  Mechanical Basis of Percussion Flaking , 1972, American Antiquity.

[13]  L. Binford.  Organization and Formation Processes: Looking at Curated Technologies , 1979, Journal of Anthropological Research.

[14]  G. Odell,et al.  Experimentation in the Formation of Edge Damage: A New Approach to Lithic Analysis , 1974 .

[15]  F. Bordes.  Typologie du paléolithique : ancien et moyen , 1988 .