Testing Archaeological Approaches to Determining Past Projectile Delivery Systems Using Ethnographic and Experimental Data

TCSA and TCSP are often considered valuable measures of projectile performance, particularly in terms of penetration and overall design. Proponents of this view have also argued that TCSA/TCSP may also be useful for identifying the origins and spread of more complex projectile technologies such as the spear thrower and bow. The strength of these arguments will be tested against ethnographic data and new experiments. The results suggest that TCSA/TCSP statistics are not robust measures of projectile performance, or reliable proxies for inferring delivery systems. An alternative approach is developed using experimental data that compares impact fracture size for three different diagnostic impact fracture types. This approach, while found to be valuable, also presents problems for archaeological identification of projectile technologies.

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