Archaeological Visibility of Bipolar Technology: An Example from the Koster Site

Abstract

Ext. de res. d'A.: Experimentally produced chipped-stone debris assemblages are analysed in a blind test to determine if it is possible to distinguish between bipolar and free-hand, hard-hammer reduction techniques. The analysis shows that manufacturing technique can be distingueshed between unmixed assemblages but that individual pieces of debris cannot be ascribted to one technique or the other with confidence. Attribute profiles for bipolar versus free-hand , hard hammer debitage assemblages are developped and applied to data sets from the Koster and Deer Track sites in west-central Illinois. The analysis suggest that bipolar reduction may have played a role in lithic reduction during the Middle Archaic and that this scheme may help to delineate speciam use or activity areas within sites

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