Poster_Final.pdf (original) (raw)

The choice of a raw material source with better knapping abilities can make a drastic difference on the outcome of that production. Recently, a variety of analytical methods have been applied to characterize the raw materials from archaeological contexts. However, their quality is an issue still little explored and, when it is, it is usually by subjective ways. The aim of our ongoing investigation is to systematically test geologic chert samples in order to recognize variation in their mechanical properties and, ultimately, putt quality into numbers. The data will allow us to understand, for instance, possible discreet variation between geological formations within a same region. To reach our objectives we used the rebound value taken with a Schmidt Hammer. This method allows evaluating the uniaxial compressive strength and elastic modulus of the rock. Our preliminary results are very promising by showing, for instance, considerable rebound values from differences chert sources. This might be related with features such as tectonic fracture of the nodules or different degrees in silicification.